Temperature Reagent System (#5423)

Overview
This is the github WIP PR for the reagent system project. This is for other developers and users to track progress of the code if they're curious about it, as well as to show that it actually works.

aurorastation.dme

@@ -507,6 +507,7 @@
 #include "code\game\machinery\CableLayer.dm"
 #include "code\game\machinery\case_button.dm"
 #include "code\game\machinery\cell_charger.dm"
+#include "code\game\machinery\chem_heater.dm"
 #include "code\game\machinery\cloning.dm"
 #include "code\game\machinery\constructable_frame.dm"
 #include "code\game\machinery\crusher_piston.dm"
@@ -845,6 +846,7 @@
 #include "code\game\objects\items\weapons\circuitboards\computer\station_alert.dm"
 #include "code\game\objects\items\weapons\circuitboards\computer\telecomms.dm"
 #include "code\game\objects\items\weapons\circuitboards\machinery\biogenerator.dm"
+#include "code\game\objects\items\weapons\circuitboards\machinery\chem_heater.dm"
 #include "code\game\objects\items\weapons\circuitboards\machinery\cloning.dm"
 #include "code\game\objects\items\weapons\circuitboards\machinery\commsantenna.dm"
 #include "code\game\objects\items\weapons\circuitboards\machinery\mech_recharger.dm"
@@ -2102,6 +2104,7 @@
 #include "code\modules\reagents\Chemistry-Reagents-Helpers.dm"
 #include "code\modules\reagents\Chemistry-Reagents.dm"
 #include "code\modules\reagents\Chemistry-Recipes.dm"
+#include "code\modules\reagents\Chemistry-Temperature.dm"
 #include "code\modules\reagents\reagent_containers.dm"
 #include "code\modules\reagents\reagent_dispenser.dm"
 #include "code\modules\reagents\Chemistry-Reagents\Chemistry-Reagents-Core.dm"
@@ -2387,6 +2390,7 @@
 #include "code\modules\web_interface\webint_procs.dm"
 #include "code\modules\xgm\xgm_gas_data.dm"
 #include "code\modules\xgm\xgm_gas_mixture.dm"
+#include "code\unit_tests\chemistry_tests.dm"
 #include "code\unit_tests\equipment_tests.dm"
 #include "code\unit_tests\foundation_tests.dm"
 #include "code\unit_tests\map_tests.dm"

code/__defines/chemistry.dm

@@ -17,6 +17,12 @@
 
 #define REAGENTS_OVERDOSE 30
 
+#define REAGENTS_BURNING_TEMP_HIGH T0C + 65 //Temperature at which high temperature burns occur
+#define REAGENTS_BURNING_TEMP_HIGH_DAMAGE 0.01 //Damage per celcius above the REAGENTS_BURNING_TEMP_HIGH define per unit.
+
+#define REAGENTS_BURNING_TEMP_LOW T0C - 80 //Temperature at which low temperature burns occur
+#define REAGENTS_BURNING_TEMP_LOW_DAMAGE 0.005 //Damage per celcius below the REAGENTS_BURNING_TEMP_LOW define per unit.
+
 #define CHEM_SYNTH_ENERGY 500 // How much energy does it take to synthesize 1 unit of chemical, in Joules.
 
 // Some on_mob_life() procs check for alien races.

code/controllers/subsystems/chemistry.dm

@@ -7,10 +7,65 @@ var/datum/controller/subsystem/chemistry/SSchemistry
 
 	var/list/active_holders = list()
 	var/list/chemical_reactions
+	var/list/chemical_reactions_clean = list()
 	var/list/chemical_reagents
 
 	var/tmp/list/processing_holders = list()
 	
+/datum/controller/subsystem/chemistry/proc/has_valid_specific_heat(var/datum/reagent/R) //Used for unit tests
+
+	if(R.specific_heat > 0)
+		return TRUE	
+	if(chemical_reagents[R.id].specific_heat > 0) //Don't think this will happen but you never know.
+		return TRUE
+		
+	var/datum/chemical_reaction/recipe = find_recipe_by_result(R.id)
+	if(recipe)
+		for(var/chem in recipe.required_reagents)
+			if(!has_valid_specific_heat(chemical_reagents[chem]))
+				return FALSE
+
+	if(R.fallback_specific_heat)
+		return TRUE
+
+	return FALSE
+
+/datum/controller/subsystem/chemistry/proc/check_specific_heat(var/datum/reagent/R)
+
+	if(R.specific_heat > 0)
+		return R.specific_heat
+
+	if(chemical_reagents[R.id].specific_heat > 0) //Don't think this will happen but you never know.
+		return chemical_reagents[R.id].specific_heat
+
+	var/datum/chemical_reaction/recipe = find_recipe_by_result(R.id)
+	if(recipe)
+		var/final_heat = 0
+		var/result_amount = recipe.result_amount
+		for(var/chem in recipe.required_reagents)
+			var/chem_specific_heat = check_specific_heat(chemical_reagents[chem])
+			if(!chem_specific_heat)
+				log_ss("chemistry", "ERROR: [R.type] does not have a specific heat value set, and there is no associated recipe for it! Please fix this by giving it a specific_heat value!")
+			final_heat += chem_specific_heat * (recipe.required_reagents[chem]/result_amount)
+
+		if(final_heat > 0)
+			chemical_reagents[R.id].specific_heat = final_heat
+			return final_heat
+
+	if(R.fallback_specific_heat)
+		chemical_reagents[R.id].specific_heat = R.fallback_specific_heat
+		return R.fallback_specific_heat
+
+	log_ss("chemistry", "ERROR: [R.type] does not have a specific heat value set, and there is no associated recipe for it! Please fix this by giving it a specific_heat value!")
+	chemical_reagents[R.id].specific_heat = 1
+	return 1
+
+/datum/controller/subsystem/chemistry/proc/find_recipe_by_result(var/result_id)
+	for(var/key in chemical_reactions_clean)
+		var/datum/chemical_reaction/CR = chemical_reactions_clean[key]
+		if(CR.result == result_id && CR.result_amount > 0)
+			return CR
+
 /datum/controller/subsystem/chemistry/stat_entry()
 	..("AH:[active_holders.len]")
 
@@ -122,3 +177,5 @@ var/datum/controller/subsystem/chemistry/SSchemistry
 			if(!chemical_reactions[reagent_id])
 				chemical_reactions[reagent_id] = list()
 			chemical_reactions[reagent_id] += D
+		if(D.id)
+			chemical_reactions_clean[D.id] = D

code/datums/wires/smartfridge.dm

@@ -1,14 +1,16 @@
 /datum/wires/smartfridge
 	holder_type = /obj/machinery/smartfridge
-	wire_count = 3
+	wire_count = 5
 
 /datum/wires/smartfridge/secure
 	random = 1
-	wire_count = 4
+	wire_count = 6
 
 var/const/SMARTFRIDGE_WIRE_ELECTRIFY	= 1
 var/const/SMARTFRIDGE_WIRE_THROW		= 2
 var/const/SMARTFRIDGE_WIRE_IDSCAN		= 4
+var/const/SMARTFRIDGE_WIRE_COOLING 		= 8
+var/const/SMARTFRIDGE_WIRE_HEATING 		= 16
 
 /datum/wires/smartfridge/CanUse(var/mob/living/L)
 	var/obj/machinery/smartfridge/S = holder
@@ -26,6 +28,8 @@ var/const/SMARTFRIDGE_WIRE_IDSCAN		= 4
 	. += "<BR>The orange light is [S.seconds_electrified ? "off" : "on"].<BR>"
 	. += "The red light is [S.shoot_inventory ? "off" : "blinking"].<BR>"
 	. += "A [S.scan_id ? "purple" : "yellow"] light is on.<BR>"
+	. += "The cyan light is [S.cooling ? "on" : "off"].<BR>"
+	. += "The blue light is [S.heating ? "on" : "off"].<BR>"
 
 /datum/wires/smartfridge/UpdatePulsed(var/index)
 	var/obj/machinery/smartfridge/S = holder
@@ -36,6 +40,12 @@ var/const/SMARTFRIDGE_WIRE_IDSCAN		= 4
 			S.seconds_electrified = 30
 		if(SMARTFRIDGE_WIRE_IDSCAN)
 			S.scan_id = !S.scan_id
+		if(SMARTFRIDGE_WIRE_COOLING)
+			S.cooling = !S.cooling
+			S.heating = FALSE
+		if(SMARTFRIDGE_WIRE_HEATING)
+			S.heating = !S.cooling
+			S.cooling = FALSE
 
 /datum/wires/smartfridge/UpdateCut(var/index, var/mended)
 	var/obj/machinery/smartfridge/S = holder
@@ -49,3 +59,11 @@ var/const/SMARTFRIDGE_WIRE_IDSCAN		= 4
 				S.seconds_electrified = -1
 		if(SMARTFRIDGE_WIRE_IDSCAN)
 			S.scan_id = 1
+		if(SMARTFRIDGE_WIRE_COOLING)
+			S.cooling = mended
+			S.heating = FALSE
+		if(SMARTFRIDGE_WIRE_HEATING)
+			S.heating = mended
+			S.cooling = FALSE
+
+

code/datums/wires/vending.dm

@@ -2,12 +2,14 @@
 
 /datum/wires/vending
 	holder_type = /obj/machinery/vending
-	wire_count = 4
+	wire_count = 6
 
 var/const/VENDING_WIRE_THROW = 1
 var/const/VENDING_WIRE_CONTRABAND = 2
 var/const/VENDING_WIRE_ELECTRIFY = 4
 var/const/VENDING_WIRE_IDSCAN = 8
+var/const/VENDING_WIRE_COOLING = 16
+var/const/VENDING_WIRE_HEATING = 32
 
 /datum/wires/vending/CanUse(var/mob/living/L)
 	var/obj/machinery/vending/V = holder
@@ -26,6 +28,8 @@ var/const/VENDING_WIRE_IDSCAN = 8
 	. += "The red light is [V.shoot_inventory ? "off" : "blinking"].<BR>"
 	. += "The green light is [(V.categories & CAT_HIDDEN) ? "on" : "off"].<BR>"
 	. += "The [V.scan_id ? "purple" : "yellow"] light is on.<BR>"
+	. += "The cyan light is [V.temperature_setting == -1 ? "on" : "off"].<BR>"
+	. += "The blue light is [V.temperature_setting == 1 ? "on" : "off"].<BR>"
 
 /datum/wires/vending/UpdatePulsed(var/index)
 	var/obj/machinery/vending/V = holder
@@ -38,6 +42,10 @@ var/const/VENDING_WIRE_IDSCAN = 8
 			V.seconds_electrified = 30
 		if(VENDING_WIRE_IDSCAN)
 			V.scan_id = !V.scan_id
+		if(VENDING_WIRE_COOLING)
+			V.temperature_setting = V.temperature_setting != -1 ? -1 : 0
+		if(VENDING_WIRE_HEATING)
+			V.temperature_setting = V.temperature_setting != 1 ? 1 : 0
 
 /datum/wires/vending/UpdateCut(var/index, var/mended)
 	var/obj/machinery/vending/V = holder
@@ -53,3 +61,7 @@ var/const/VENDING_WIRE_IDSCAN = 8
 				V.seconds_electrified = -1
 		if(VENDING_WIRE_IDSCAN)
 			V.scan_id = 1
+		if(VENDING_WIRE_COOLING)
+			V.temperature_setting = mended && V.temperature_setting != 1 ? -1 : 0
+		if(VENDING_WIRE_HEATING)
+			V.temperature_setting = mended && V.temperature_setting != -1 ? 1 : 0

code/game/machinery/chem_heater.dm

@@ -0,0 +1,156 @@
+/obj/machinery/chem_heater
+	name = "chemical heater"
+	icon = 'icons/obj/chemical.dmi'
+	icon_state = "mixer0b"
+	use_power = 0
+	idle_power_usage = 100
+	density = 1
+	anchored = 1
+	var/obj/item/weapon/reagent_containers/container
+	var/target_temperature = 300 //Measured in kelvin.
+	var/accept_drinking = FALSE
+	var/machine_strength = 0 //How much joules to add per process. Controlled by manipulators.
+	var/should_heat = TRUE
+	var/min_temperature = 50
+	var/max_temperature = 1000
+
+	component_types = list(
+		/obj/item/weapon/circuitboard/chem_heater,
+		/obj/item/weapon/stock_parts/manipulator,
+		/obj/item/weapon/stock_parts/manipulator,
+		/obj/item/weapon/stock_parts/manipulator
+	)
+
+/obj/machinery/chem_heater/attack_hand(mob/user)
+	user.set_machine(src)
+	interact(user)
+
+/obj/machinery/chem_heater/attackby(obj/item/O, mob/user)
+	if(default_deconstruction_screwdriver(user, O))
+		return
+	if(default_deconstruction_crowbar(user, O))
+		return
+	if(default_part_replacement(user, O))
+		return
+	if(istype(O, /obj/item/weapon/reagent_containers/glass) || istype(O, /obj/item/weapon/reagent_containers/food))
+		if(container)
+			to_chat(user,span("warning","There is already \a [container] on \the [src]!"))
+			return
+
+		var/obj/item/weapon/reagent_containers/RC = O
+		if(!RC.is_open_container())
+			to_chat(user,span("warning","You don't see how \the [src] could heat up the reagents in \the [RC]."))
+			return
+
+		container =  RC
+		user.drop_from_inventory(RC,src)
+		to_chat(user,span("notice","You set \the [RC] in \the [src]."))
+		updateUsrDialog()
+		return
+
+/obj/machinery/chem_heater/interact(mob/user as mob)
+	if(stat & BROKEN)
+		return
+	user.set_machine(src)
+	var/dat ="<html>"
+	dat += "<head><TITLE>Chem Heater MKI</TITLE><style>body{font-family:Garamond}</style></head>"
+	dat += "<body><H1>Chem Heater MKI</H1>"
+
+	dat += "<p>Power: <a href='?src=\ref[src];action=togglepower'>[use_power ? "On" : "Off"]</a></p>"
+	dat += "<p>Target Temp: [round(target_temperature)]K / [round(target_temperature - T0C,0.1)]C<br> "
+
+	dat += "("
+	dat += "<a href='?src=\ref[src];action=adjusttemp;power=-100'>----</a>|"
+	dat += "<a href='?src=\ref[src];action=adjusttemp;power=-25'>---</a>|"
+	dat += "<a href='?src=\ref[src];action=adjusttemp;power=-5'>--</a>|"
+	dat += "<a href='?src=\ref[src];action=adjusttemp;power=-1'>-</a>|"
+	dat += "<a href='?src=\ref[src];action=adjusttemp;power=1'>+</a>|"
+	dat += "<a href='?src=\ref[src];action=adjusttemp;power=5'>++</a>|"
+	dat += "<a href='?src=\ref[src];action=adjusttemp;power=25'>+++</a>|"
+	dat += "<a href='?src=\ref[src];action=adjusttemp;power=100'>++++</a>"
+	dat += ")</p>"
+
+	if(container)
+		dat += "<p>Beaker Temp: [round(container.get_temperature(),0.01)]K / [round(container.get_temperature() - T0C,0.1)]C (<a href='?src=\ref[src];action=removebeaker'>Remove</a>)</p>"
+	else
+		dat += "<p>No container loaded!</p>"
+
+	dat += "</body><html>"
+
+	user << browse(dat, "window=chem_heater")
+	onclose(user, "chem_heater")
+
+/obj/machinery/chem_heater/Topic(href, href_list)
+	if(stat & BROKEN) return
+	if(usr.stat || usr.restrained()) return
+	if(!in_range(src, usr)) return
+
+	usr.set_machine(src)
+
+	switch(href_list["action"])
+		if("togglepower")
+			use_power = !use_power
+			if(container)
+				should_heat = target_temperature >= container.get_temperature()
+		if("removebeaker")
+			if(container)
+				container.forceMove(src.loc)
+				container = null
+				update_icon()
+		if("adjusttemp")
+			target_temperature = max(min_temperature,min(target_temperature + text2num(href_list["power"]),max_temperature))
+			if(container)
+				should_heat = target_temperature >= container.get_temperature()
+
+	updateUsrDialog()
+
+/obj/machinery/chem_heater/machinery_process()
+
+	..()
+
+	if(!use_power)
+		return
+
+	if(container && container.reagents)
+
+		var/current_temperature = container.reagents.get_temperature()
+
+		if(should_heat && current_temperature >= target_temperature)
+			use_power = 0
+			updateUsrDialog()
+			return
+		else if(!should_heat && current_temperature <= target_temperature)
+			use_power = 0
+			updateUsrDialog()
+			return
+
+		var/joules_to_use = machine_strength * 1000
+		var/mod = should_heat ? 1 : -1
+		var/thermal_energy_change = 0
+		var/thermal_energy_limit = container.reagents.get_thermal_energy_change(current_temperature,target_temperature) //Don't go over the target temperature
+		var/thermal_energy_limit2 = container.reagents.get_thermal_energy_change(current_temperature,current_temperature + machine_strength*mod*5) //So small reagents don't go from 0 to 1000 in a few seconds.
+		if(mod > 0) //GOING UP
+			thermal_energy_change = min(joules_to_use,thermal_energy_limit,thermal_energy_limit2)
+		else //GOING DOWN
+			thermal_energy_change = max(-joules_to_use,thermal_energy_limit,thermal_energy_limit2)
+
+		container.reagents.add_thermal_energy(thermal_energy_change)
+		container.reagents.handle_reactions()
+		use_power(joules_to_use)
+		updateUsrDialog()
+
+	else
+		use_power = 0
+		updateUsrDialog()
+		return
+
+	return 1
+
+/obj/machinery/chem_heater/RefreshParts()
+	machine_strength = initial(machine_strength)
+	for(var/obj/item/weapon/stock_parts/P in component_parts)
+		if(ismanipulator(P))
+			machine_strength += P.rating
+
+
+

code/game/machinery/kitchen/smartfridge.dm

@@ -21,6 +21,12 @@
 	var/locked = 0
 	var/scan_id = 1
 	var/is_secure = 0
+
+	var/cooling = 0 //Whether or not to vend products at the cooling temperature
+	var/heating = 0 //Whether or not to vend products at the heating temperature
+	var/cooling_temperature = T0C + 5 //Best temp for soda.
+	var/heating_temperature = T0C + 57 //Best temp for coffee.
+
 	var/datum/wires/smartfridge/wires = null
 	atmos_canpass = CANPASS_NEVER
 
@@ -131,6 +137,7 @@
 /obj/machinery/smartfridge/drinks
 	name = "\improper Drink Showcase"
 	desc = "A refrigerated storage unit for tasty tasty alcohol."
+	cooling = TRUE
 
 /obj/machinery/smartfridge/drinks/accept_check(var/obj/item/O as obj)
 	if(istype(O,/obj/item/weapon/reagent_containers/glass) || istype(O,/obj/item/weapon/reagent_containers/food/drinks) || istype(O,/obj/item/weapon/reagent_containers/food/condiment))
@@ -176,6 +183,33 @@
 		src.seconds_electrified--
 	if(src.shoot_inventory && prob(2))
 		src.throw_item()
+	if(cooling || heating)
+
+		var/mod = cooling ? -1 : 1
+
+		for(var/obj/item/I in contents)
+
+			if(!I.reagents)
+				continue
+
+			var/r_temperature = I.reagents.get_temperature()
+
+			if(mod == 1 && r_temperature <= heating_temperature)
+				continue
+			else if(mod == -1 && r_temperature <= cooling_temperature)
+				continue
+
+			var/thermal_energy_change = 0
+
+			if(mod == 1) //GOING UP
+				thermal_energy_change = min(active_power_usage,I.reagents.get_thermal_energy_change(r_temperature,heating_temperature))
+			else if (mod == -1) //GOING DOWN
+				thermal_energy_change = max(-active_power_usage,I.reagents.get_thermal_energy_change(r_temperature,cooling_temperature))
+
+			I.reagents.add_thermal_energy(thermal_energy_change)
+			use_power(active_power_usage)
+
+
 
 /obj/machinery/smartfridge/power_change()
 	var/old_stat = stat

code/game/machinery/vending.dm

@@ -103,6 +103,11 @@
 	var/list/restock_blocked_items = list() //Items that can not be restocked if restock_items is enabled
 	var/random_itemcount = 1 //If the number of items should be randomized
 
+	var/temperature_setting = 0 //-1 means cooling, 1 means heating, 0 means doing nothing.
+
+	var/cooling_temperature = T0C + 5 //Best temp for soda.
+	var/heating_temperature = T0C + 57 //Best temp for coffee.
+
 /obj/machinery/vending/Initialize()
 	. = ..()
 	wires = new(src)
@@ -569,8 +574,6 @@
 	src.status_error = 0
 	SSnanoui.update_uis(src)
 
-
-
 	if (R.category & CAT_COIN)
 		if(!coin)
 			user << "<span class='notice'>You need to insert a coin to get this item.</span>"
@@ -606,12 +609,20 @@
 		flick(src.icon_vend,src)
 	spawn(src.vend_delay)
 		playsound(src.loc, 'sound/machines/vending.ogg', 35, 1)
-		new R.product_path(get_turf(src))
+		var/obj/vended = new R.product_path(get_turf(src))
 		src.status_message = ""
 		src.status_error = 0
 		src.vend_ready = 1
 		currently_vending = null
 		SSnanoui.update_uis(src)
+		if(istype(vended,/obj/item/weapon/reagent_containers/))
+			var/obj/item/weapon/reagent_containers/RC = vended
+			if(RC.reagents)
+				switch(temperature_setting)
+					if(-1)
+						use_power(RC.reagents.set_temperature(cooling_temperature))
+					if(1)
+						use_power(RC.reagents.set_temperature(heating_temperature))
 
 /obj/machinery/vending/proc/stock(var/datum/data/vending_product/R, var/mob/user)
 	user << "<span class='notice'>You insert \the [R.product_name] in the product receptor.</span>"

code/game/machinery/vending_types.dm

@@ -129,7 +129,6 @@
 	icon_vend = "coffee-vend"
 	vend_delay = 34
 	idle_power_usage = 211 //refrigerator - believe it or not, this is actually the average power consumption of a refrigerated vending machine according to NRCan.
-	vend_power_usage = 85000 //85 kJ to heat a 250 mL cup of coffee
 	vend_id = "coffee"
 	products = list(
 		/obj/item/weapon/reagent_containers/food/drinks/coffee = 25,
@@ -148,6 +147,9 @@
 		/obj/item/weapon/reagent_containers/food/drinks/h_chocolate = 22,
 		/obj/item/weapon/reagent_containers/food/snacks/donut/normal = 6
 	)
+	cooling_temperature = T0C + 57 //Optimal coffee temperature
+	heating_temperature = T0C + 100 //ULTRA HOT COFFEE
+	temperature_setting = -1
 
 /obj/machinery/vending/snack
 	name = "Getmore Chocolate Corp"
@@ -247,6 +249,7 @@
 		/obj/item/weapon/reagent_containers/food/drinks/cans/koispunch = 50
 	)
 	idle_power_usage = 211 //refrigerator - believe it or not, this is actually the average power consumption of a refrigerated vending machine according to NRCan.
+	temperature_setting = -1
 
 //This one's from bay12
 /obj/machinery/vending/cart
@@ -328,6 +331,7 @@
 	)
 	idle_power_usage = 211 //refrigerator - believe it or not, this is actually the average power consumption of a refrigerated vending machine according to NRCan.
 	random_itemcount = 0
+	temperature_setting = -1
 
 //This one's from bay12
 /obj/machinery/vending/phoronresearch
@@ -369,6 +373,7 @@
 		/obj/item/weapon/reagent_containers/pill/tox = 1
 	)
 	random_itemcount = 0
+	temperature_setting = -1
 
 /obj/machinery/vending/wallmed2
 	name = "NanoMed"
@@ -389,6 +394,7 @@
 		/obj/item/weapon/reagent_containers/pill/tox = 3
 	)
 	random_itemcount = 0
+	temperature_setting = -1
 
 /obj/machinery/vending/security
 	name = "SecTech"
@@ -649,6 +655,7 @@
 	)
 	idle_power_usage = 211 //refrigerator - believe it or not, this is actually the average power consumption of a refrigerated vending machine according to NRCan.
 	random_itemcount = 0
+	temperature_setting = -1
 
 /obj/machinery/vending/tool
 	name = "YouTool"
@@ -861,6 +868,7 @@
 		/obj/item/weapon/reagent_containers/food/drinks/cans/zoradrone = 30,
 	)
 	idle_power_usage = 211 //refrigerator - believe it or not, this is actually the average power consumption of a refrigerated vending machine according to NRCan.
+	temperature_setting = -1
 
 /obj/machinery/vending/battlemonsters
 	name = "\improper Battlemonsters vendor"

code/game/objects/items/weapons/circuitboards/machinery/chem_heater.dm

@@ -0,0 +1,12 @@
+#ifndef T_BOARD
+#error T_BOARD macro is not defined but we need it!
+#endif
+
+/obj/item/weapon/circuitboard/chem_heater
+	name = T_BOARD("chem heater")
+	build_path = "/obj/machinery/chem_heater"
+	board_type = "machine"
+	origin_tech = list(TECH_DATA = 1, TECH_BIO = 2)
+	req_components = list(
+		"/obj/item/weapon/stock_parts/manipulator" = 3
+	)

code/modules/admin/admin_attack_log.dm

@@ -39,13 +39,15 @@ proc/admin_attacker_log_many_victims(var/mob/attacker, var/list/mob/victims, var
 	for(var/mob/victim in victims)
 		admin_attack_log(attacker, victim, attacker_message, victim_message, admin_message)
 
-proc/admin_inject_log(mob/attacker, mob/victim, obj/item/weapon, reagents, amount_transferred, violent=0)
+proc/admin_inject_log(mob/attacker, mob/victim, obj/item/weapon, reagents, temperature, amount_transferred, violent=0)
 	if(violent)
 		violent = "violently "
 	else
 		violent = ""
+
+	var/temperature_text = "Temperature: ([temperature]K/[temperature]C)"
 	admin_attack_log(attacker,
 	                 victim,
-	                 "used \the [weapon] to [violent]inject - [reagents] - [amount_transferred]u transferred",
-	                 "was [violent]injected with \the [weapon] - [reagents] - [amount_transferred]u transferred",
-	                 "used \the [weapon] to [violent]inject [reagents] ([amount_transferred]u transferred) into")
+	                 "used \the [weapon] to [violent]inject - [reagents] [temperature_text] - [amount_transferred]u transferred",
+	                 "was [violent]injected with \the [weapon] - [reagents] [temperature_text] - [amount_transferred]u transferred",
+	                 "used \the [weapon] to [violent]inject [reagents] [temperature_text] ([amount_transferred]u transferred) into")

code/modules/client/preference_setup/loadout/loadout_general.dm

@@ -38,14 +38,34 @@
 	..()
 	gear_tweaks += new/datum/gear_tweak/reagents(lunchables_alcohol_reagents())
 
-/datum/gear/vacflask
-	display_name = "vacuum-flask"
+/datum/gear/vacflask_cold
+	display_name = "cold vacuum-flask"
 	path = /obj/item/weapon/reagent_containers/food/drinks/flask/vacuumflask
 
-/datum/gear/vacflask/New()
+/datum/gear/vacflask_cold/New()
 	..()
 	gear_tweaks += new/datum/gear_tweak/reagents(lunchables_drink_reagents())
 
+/datum/gear/vacflask_cold/spawn_item(var/location, var/metadata)
+	. = ..()
+	var/obj/item/weapon/reagent_containers/food/drinks/flask/vacuumflask/spawned_flask = .
+	if(istype(spawned_flask) && spawned_flask.reagents)
+		spawned_flask.reagents.set_temperature(T0C + 5)
+
+/datum/gear/vacflask_hot
+	display_name = "hot vacuum-flask"
+	path = /obj/item/weapon/reagent_containers/food/drinks/flask/vacuumflask
+
+/datum/gear/vacflask_hot/New()
+	..()
+	gear_tweaks += new/datum/gear_tweak/reagents(lunchables_drink_reagents())
+
+/datum/gear/vacflask_hot/spawn_item(var/location, var/metadata)
+	. = ..()
+	var/obj/item/weapon/reagent_containers/food/drinks/flask/vacuumflask/spawned_flask = .
+	if(istype(spawned_flask) && spawned_flask.reagents)
+		spawned_flask.reagents.set_temperature(T0C + 45)
+
 /datum/gear/lunchbox
 	display_name = "lunchbox"
 	description = "A little lunchbox."
@@ -102,7 +122,6 @@
 	flags["flag, Democratic People's Republic of Adhomai"] = /obj/item/weapon/flag/dpra/l
 	gear_tweaks += new/datum/gear_tweak/path(flags)
 
-
 /datum/gear/towel
 	display_name = "towel"
 	path = /obj/item/weapon/towel

code/modules/clothing/rings/rings.dm

@@ -30,7 +30,7 @@
 			if(H.reagents)
 				var/contained_reagents = reagents.get_reagents()
 				var/trans = reagents.trans_to_mob(H, 15, CHEM_BLOOD)
-				admin_inject_log(usr, H, src, contained_reagents, trans)
+				admin_inject_log(usr, H, src, contained_reagents, reagents.get_temperature(), trans)
 	return
 
 //Sleepy Ring

code/modules/food/recipe.dm

@@ -54,6 +54,8 @@
 
 	var/reagent_mix = RECIPE_REAGENT_MAX	//How to handle reagent differences between the ingredients and the results
 
+	var/finished_temperature = T0C + 40 //The temperature of the reagents of the final product.Only affects nutrient type.
+
 	var/appliance = MICROWAVE//Which apppliances this recipe can be made in.
 	//List of defines is in _defines/misc.dm. But for reference they are:
 	/*
@@ -163,6 +165,10 @@
 		O.reagents.trans_to_obj(result_obj, O.reagents.total_volume)
 		qdel(O)
 	container.reagents.clear_reagents()
+	for(var/datum/reagent/R in result_obj.reagents)
+		if(istype(R,/datum/reagent/nutriment/) && R.get_temperature() < finished_temperature)
+			R.set_temperature(finished_temperature)
+
 	return result_obj
 
 // food-related

code/modules/mob/living/carbon/taste.dm

@@ -60,4 +60,32 @@ calculate text size per text.
 			else
 				out += "[intensity_desc] [taste_desc]"
 
-	return "[english_list(out, "something indescribable")]."
+	var/temp_text = ""
+
+	switch(get_temperature())
+		if(-INFINITY to T0C - 50)
+			temp_text = "lethally freezing"
+		if(T0C - 50 to T0C - 25)
+			temp_text = "freezing"
+		if(T0C - 25 to T0C - 10)
+			temp_text = "very cold"
+		if(T0C - 10 to T0C)
+			temp_text = "cold"
+		if(T0C to T0C + 15)
+			temp_text = "cool"
+		if(T0C + 15 to T0C + 25)
+			temp_text = "lukewarm"
+		if(T0C + 25 to T0C + 40)
+			temp_text = "warm"
+		if(T0C + 40 to T0C + 70)
+			temp_text = "hot"
+		if(T0C + 70 to T0C + 90)
+			temp_text = "scolding hot"
+		if(T0C + 90 to T0C + 120)
+			temp_text = "burning hot"
+		if(T0C + 120 to T0C + 150)
+			temp_text = "molten hot"
+		if(T0C + 150 to INFINITY)
+			temp_text = "lethally hot"
+
+	return "[temp_text] [english_list(out, "something indescribable")]."

code/modules/paperwork/pen.dm

@@ -93,7 +93,7 @@
 			if(M.reagents)
 				var/contained_reagents = reagents.get_reagents()
 				var/trans = reagents.trans_to_mob(M, 30, CHEM_BLOOD)
-				admin_inject_log(user, M, src, contained_reagents, trans)
+				admin_inject_log(user, M, src, contained_reagents, reagents.get_temperature(), trans)
 
 /*
  * Sleepy Pens

code/modules/projectiles/guns/launcher/syringe_gun.dm

@@ -53,7 +53,7 @@
 			if(L.can_inject() && syringe.reagents)
 				var/reagent_log = syringe.reagents.get_reagents()
 				syringe.reagents.trans_to_mob(L, 15, CHEM_BLOOD)
-				admin_inject_log(thrower, L, src, reagent_log, 15, violent=1)
+				admin_inject_log(thrower, L, src, reagent_log, reagents.get_temperature(), 15, violent=1)
 
 		syringe.break_syringe(iscarbon(hit_atom)? hit_atom : null)
 		syringe.update_icon()

code/modules/reagents/Chemistry-Holder.dm

@@ -39,7 +39,6 @@
 
 	return the_reagent
 
-
 /datum/reagents/proc/get_reagent(var/id) // Returns reference to reagent matching passed ID
 	for(var/datum/reagent/A in reagent_list)
 		if (A.id == id)
@@ -67,14 +66,24 @@
 
 	return the_id
 
-/datum/reagents/proc/update_total() // Updates volume.
+/datum/reagents/proc/update_total() // Updates volume and temperature.
+
 	total_volume = 0
+
 	for(var/datum/reagent/R in reagent_list)
 		if(R.volume < MINIMUM_CHEMICAL_VOLUME)
 			del_reagent(R.id)
 		else
 			total_volume += R.volume
-	return
+
+	return max(total_volume,0)
+
+/datum/reagents/proc/update_holder(var/reactions = TRUE)
+	if(update_total() && reactions)
+		handle_reactions()
+
+	if(my_atom)
+		my_atom.on_reagent_change()
 
 /datum/reagents/proc/delete()
 	for(var/datum/reagent/R in reagent_list)
@@ -88,11 +97,8 @@
 
 //returns 1 if the holder should continue reactiong, 0 otherwise.
 /datum/reagents/proc/process_reactions()
-	if(!my_atom) // No reactions in temporary holders
-		return 0
-	if(!my_atom.loc) //No reactions inside GC'd containers
-		return 0
-	if(my_atom.flags & NOREACT) // No reactions here
+	if(!my_atom || !my_atom.loc || my_atom.flags & NOREACT)
+		equalize_temperature()
 		return 0
 
 	var/reaction_occured
@@ -118,42 +124,48 @@
 	for(var/datum/chemical_reaction/C in effect_reactions)
 		C.post_reaction(src)
 
-	update_total()
+	equalize_temperature()
+	update_holder(FALSE)
 	return reaction_occured
 
 /* Holder-to-chemical */
 
-/datum/reagents/proc/add_reagent(var/id, var/amount, var/data = null, var/safety = 0)
+/datum/reagents/proc/add_reagent(var/id, var/amount, var/data = null, var/safety = 0, var/temperature = 0, var/thermal_energy = 0)
 	if(!isnum(amount) || amount <= 0)
 		return 0
 
-	update_total()
+	update_total() //Does this need to be here? It's called in update_holder.
 	amount = min(amount, get_free_space())
 
 	for(var/datum/reagent/current in reagent_list)
-		if(current.id == id)
+		if(current.id == id) //Existing reagent
 			current.volume += amount
+			if(thermal_energy > 0)
+				current.add_thermal_energy(thermal_energy)
+			else
+				if(temperature <= 0)
+					temperature = current.default_temperature
+				current.add_thermal_energy(temperature * current.specific_heat * amount)
 			if(!isnull(data)) // For all we know, it could be zero or empty string and meaningful
 				current.mix_data(data, amount)
-			update_total()
-
-			if(!safety)
-				handle_reactions()
-			if(my_atom)
-				my_atom.on_reagent_change()
+			update_holder(!safety)
 			return 1
+
 	var/datum/reagent/D = SSchemistry.chemical_reagents[id]
 	if(D)
 		var/datum/reagent/R = new D.type()
 		reagent_list += R
 		R.holder = src
 		R.volume = amount
+		R.specific_heat = SSchemistry.check_specific_heat(R)
+		if(thermal_energy > 0)
+			R.thermal_energy = thermal_energy
+		else
+			if(temperature <= 0)
+				temperature = R.default_temperature
+			R.set_temperature(temperature)
 		R.initialize_data(data)
-		update_total()
-		if(!safety)
-			handle_reactions()
-		if(my_atom)
-			my_atom.on_reagent_change()
+		update_holder(!safety)
 		return 1
 	else
 		warning("[my_atom] attempted to add a reagent called '[id]' which doesn't exist. ([usr])")
@@ -164,12 +176,10 @@
 		return 0
 	for(var/datum/reagent/current in reagent_list)
 		if(current.id == id)
+			var/old_volume = current.volume
 			current.volume -= amount // It can go negative, but it doesn't matter
-			update_total() // Because this proc will delete it then
-			if(!safety)
-				handle_reactions()
-			if(my_atom)
-				my_atom.on_reagent_change()
+			current.add_thermal_energy( -(current.thermal_energy * (amount/old_volume)) )
+			update_holder(!safety)
 			return 1
 	return 0
 
@@ -178,9 +188,7 @@
 		if (current.id == id)
 			reagent_list -= current
 			qdel(current)
-			update_total()
-			if(my_atom)
-				my_atom.on_reagent_change()
+			update_holder(FALSE)
 			return 0
 
 /datum/reagents/proc/has_reagent(var/id, var/amount = 0)
@@ -247,8 +255,7 @@
 		var/amount_to_remove = current.volume * part
 		remove_reagent(current.id, amount_to_remove, 1)
 
-	update_total()
-	handle_reactions()
+	update_holder()
 	return amount
 
 /datum/reagents/proc/trans_to_holder(var/datum/reagents/target, var/amount = 1, var/multiplier = 1, var/copy = 0) // Transfers [amount] reagents from [src] to [target], multiplying them by [multiplier]. Returns actual amount removed from [src] (not amount transferred to [target]).
@@ -268,7 +275,8 @@
 
 	for(var/datum/reagent/current in reagent_list)
 		var/amount_to_transfer = current.volume * part
-		target.add_reagent(current.id, amount_to_transfer * multiplier, current.get_data(), 1) // We don't react until everything is in place
+		var/energy_to_transfer = amount_to_transfer * current.get_thermal_energy_per_unit()
+		target.add_reagent(current.id, amount_to_transfer * multiplier, current.get_data(), 1, thermal_energy = energy_to_transfer * multiplier) // We don't react until everything is in place
 		if(!copy)
 			remove_reagent(current.id, amount_to_transfer, 1)
 
@@ -311,12 +319,14 @@
 	if (!target)
 		return
 
+	var/datum/reagent/transfering_reagent = get_reagent(id)
+
 	if (istype(target, /atom))
 		var/atom/A = target
 		if (!A.reagents || !A.simulated)
 			return
 
-	amount = min(amount, get_reagent_amount(id))
+	amount = min(amount, transfering_reagent.volume)
 
 	if(!amount)
 		return
@@ -324,7 +334,8 @@
 
 	var/datum/reagents/F = new /datum/reagents(amount)
 	var/tmpdata = get_data(id)
-	F.add_reagent(id, amount, tmpdata)
+	var/transfering_thermal_energy = transfering_reagent.get_thermal_energy() * (amount/transfering_reagent.volume)
+	F.add_reagent(id, amount, tmpdata, thermal_energy = transfering_thermal_energy)
 	remove_reagent(id, amount)
 
 
@@ -346,14 +357,23 @@
 		touch_obj(target)
 	return
 
-/datum/reagents/proc/touch_mob(var/mob/target)
+/datum/reagents/proc/touch_mob(var/mob/living/target)
 	if(!target || !istype(target) || !target.simulated)
 		return
+	var/temperature = src.get_temperature()
+	if(temperature >= REAGENTS_BURNING_TEMP_HIGH)
+		var/burn_damage = Clamp(total_volume*(temperature - REAGENTS_BURNING_TEMP_HIGH)*REAGENTS_BURNING_TEMP_HIGH_DAMAGE,0,20)
+		target.adjustFireLoss(burn_damage)
+		target.visible_message(span("danger","\The hot liquid burns \the [target]!"))
+	else if(temperature <= REAGENTS_BURNING_TEMP_LOW)
+		var/burn_damage = Clamp(total_volume*(REAGENTS_BURNING_TEMP_LOW - temperature)*REAGENTS_BURNING_TEMP_LOW_DAMAGE,0,20)
+		target.adjustFireLoss(burn_damage)
+		target.visible_message(span("danger","\The freezing cold liquid burns \the [target]!"))
 
 	for(var/datum/reagent/current in reagent_list)
 		current.touch_mob(target, current.volume)
 
-	update_total()
+	update_holder()
 
 /datum/reagents/proc/touch_turf(var/turf/target)
 	if(!target || !istype(target) || !target.simulated)
@@ -362,7 +382,7 @@
 	for(var/datum/reagent/current in reagent_list)
 		current.touch_turf(target, current.volume)
 
-	update_total()
+	update_holder()
 
 /datum/reagents/proc/touch_obj(var/obj/target)
 	if(!target || !istype(target) || !target.simulated)
@@ -371,7 +391,7 @@
 	for(var/datum/reagent/current in reagent_list)
 		current.touch_obj(target, current.volume)
 
-	update_total()
+	update_holder()
 
 // Attempts to place a reagent on the mob's skin.
 // Reagents are not guaranteed to transfer to the target.

code/modules/reagents/Chemistry-Metabolism.dm

@@ -20,4 +20,5 @@
 
 	for(var/datum/reagent/current in reagent_list)
 		current.on_mob_life(parent, metabolism_type, metabolism_class)
+
 	update_total()

code/modules/reagents/Chemistry-Reagents.dm

@@ -30,6 +30,16 @@
 	var/metabolism_min = 0.01 //How much for the medicine to be present in the system to actually have an effect.
 	var/conflicting_reagent //Reagents that conflict with this medicine, and cause adverse effects when in the blood.
 
+	var/default_temperature = T0C + 20 //This is it's default spawning temperature, if none is provided.
+	var/thermal_energy = 0 //Internal value, should never change.
+	var/specific_heat = -1 //The higher, the more difficult it is to change its difficult. 0 or lower values indicate that the specific heat has yet to be assigned.
+	var/fallback_specific_heat = -1 //Setting this value above 0 will set the specific heat to this value only if the system could not find an appropriate specific heat to assign using the recipe system.
+	//Never ever ever ever change this value for datum/reagent. This should only be used for massive, yet specific things like drinks or food where it is infeasible to assign a specific heat value.
+
+/datum/reagent/proc/initialize_data(var/newdata) // Called when the reagent is created.
+	if(!isnull(newdata))
+		data = newdata
+
 /datum/reagent/proc/remove_self(var/amount) // Shortcut
 	if (!holder)
 		//PROCLOG_WEIRD("Null holder found. Name: [name], id: [id]")
@@ -38,7 +48,7 @@
 	holder.remove_reagent(id, amount)
 
 // This doesn't apply to skin contact - this is for, e.g. extinguishers and sprays. The difference is that reagent is not directly on the mob's skin - it might just be on their clothing.
-/datum/reagent/proc/touch_mob(var/mob/M, var/amount)
+/datum/reagent/proc/touch_mob(var/mob/living/M, var/amount)
 	return
 
 /datum/reagent/proc/touch_obj(var/obj/O, var/amount) // Acid melting, cleaner cleaning, etc
@@ -55,9 +65,6 @@
 	if(alien & unaffected_species && location != CHEM_TOUCH)
 		return
 
-	if(!dose && volume)//If dose is currently zero, we do the first effect
-		initial_effect(M, alien)
-
 	var/removed = metabolism
 	if(ingest_met && (location == CHEM_INGEST))
 		removed = ingest_met
@@ -74,6 +81,12 @@
 
 	dose = min(dose + removed, max_dose)
 
+	//There is no science here. It's just pure gameplay balance.
+	//Every degree above/below room temp increases/decreases body temperature by 0.2 * removed.
+	//Drinking 1u of a 100 celcius mix will increase your body temperature by 16 celcius.
+	//Drinking 1u of a 1000 celcius mix will increase your body temperature by 160 celcius.
+	M.bodytemperature += (get_temperature() - (T0C + 20)) * removed * 0.2
+
 	for(var/datum/reagent/R in M.bloodstr.reagent_list)
 		if(istype(R, conflicting_reagent))
 			affect_conflicting(M,alien,removed,R)
@@ -87,6 +100,7 @@
 				affect_touch(M, alien, removed)
 			if(CHEM_BREATHE)
 				affect_breathe(M, alien, removed)
+
 	remove_self(removed)
 
 //Initial effect is called once when the reagent first starts affecting a mob.
@@ -114,10 +128,6 @@
 /datum/reagent/proc/overdose(var/mob/living/carbon/M, var/alien, var/removed = 0, var/scale = 1) // Overdose effect. Doesn't happen instantly.
 	M.adjustToxLoss(REM)
 
-/datum/reagent/proc/initialize_data(var/newdata) // Called when the reagent is created.
-	if(!isnull(newdata))
-		data = newdata
-
 /datum/reagent/proc/mix_data(var/newdata, var/newamount) // You have a reagent with data, and new reagent with its own data get added, how do you deal with that?
 	return
 
@@ -141,3 +151,7 @@
 
 /datum/reagent/proc/reaction_mob(var/mob/target)
 	touch_mob(target)
+
+
+
+

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Core.dm

@@ -175,6 +175,8 @@
 
 	unaffected_species = IS_MACHINE
 
+	specific_heat = 1.541
+
 /datum/reagent/water/affect_ingest(var/mob/living/carbon/M, var/alien, var/removed)
 	if(!istype(M))
 		return
@@ -222,6 +224,7 @@
 				cube.Expand()
 
 /datum/reagent/water/touch_mob(var/mob/M, var/amount)
+	. = ..()
 	if(istype(M) && isliving(M))
 		var/mob/living/L = M
 		var/needed = L.fire_stacks * 10
@@ -259,6 +262,8 @@
 	glass_name = "glass of welder fuel"
 	glass_desc = "Unless you are an industrial tool, this is probably not safe for consumption."
 
+	specific_heat = 0.605
+
 /datum/reagent/fuel/touch_turf(var/turf/T)
 	new /obj/effect/decal/cleanable/liquid_fuel(T, volume)
 	remove_self(volume)
@@ -268,6 +273,7 @@
 	M.adjustToxLoss(2 * removed)
 
 /datum/reagent/fuel/touch_mob(var/mob/living/L, var/amount)
+	. = ..()
 	if(istype(L))
 		L.adjust_fire_stacks(amount / 10) // Splashing people with welding fuel to make them easy to ignite!
 
@@ -289,6 +295,7 @@
 	return
 
 /datum/reagent/fuel/touch_mob(var/mob/living/L, var/amount)
+	. = ..()
 	if(istype(L))
 		L.adjust_fire_stacks(amount / 10) // Splashing people with welding fuel to make them easy to ignite!
 		new /obj/effect/decal/cleanable/liquid_fuel/napalm(get_turf(L), amount/3)

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Dispenser.dm

@@ -6,6 +6,7 @@
 	color = "#808080"
 	metabolism = REM * 0.2
 	taste_description = "acid"
+	specific_heat = 0.567
 
 /datum/reagent/acetone/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	M.adjustToxLoss(removed * 3)
@@ -35,6 +36,7 @@
 	color = "#A8A8A8"
 	taste_description = "metal"
 	taste_mult = 1.1
+	specific_heat = 0.811
 
 /datum/reagent/ammonia
 	name = "Ammonia"
@@ -47,6 +49,7 @@
 	taste_mult = 2
 	breathe_mul = 2
 	breathe_met = REM * 0.25
+	specific_heat = 1.048
 
 /datum/reagent/ammonia/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(alien == IS_VOX)
@@ -63,6 +66,7 @@
 	ingest_met = REM * 5
 	taste_description = "sour chalk"
 	taste_mult = 1.5
+	specific_heat = 0.018
 
 /datum/reagent/carbon/affect_ingest(var/mob/living/carbon/M, var/alien, var/removed)
 	if(M.ingested && M.ingested.reagent_list.len > 1) // Need to have at least 2 reagents - cabon and something to remove
@@ -87,6 +91,7 @@
 	description = "A highly ductile metal."
 	color = "#6E3B08"
 	taste_description = "copper"
+	specific_heat = 1.148
 
 /datum/reagent/alcohol //Parent class for all alcoholic reagents, though this one shouldn't be used anywhere.
 	name = null	// This null name should prevent alcohol from being added to global lists.
@@ -126,6 +131,7 @@
 	return ..()
 
 /datum/reagent/alcohol/touch_mob(mob/living/L, amount)
+	. = ..()
 	if (istype(L) && strength > 40)
 		L.adjust_fire_stacks((amount / (flammability_divisor || 1)) * (strength / 100))
 
@@ -165,6 +171,8 @@
 	glass_name = "glass of ethanol"
 	glass_desc = "A well-known alcohol with a variety of applications."
 
+	specific_heat = 0.605
+
 /datum/reagent/alcohol/ethanol/affect_ingest(var/mob/living/carbon/human/M, var/alien, var/removed)
 	if(!istype(M))
 		return
@@ -215,6 +223,8 @@
 	glass_name = "glass of butanol"
 	glass_desc = "A fairly harmless alcohol that has intoxicating effects on certain species."
 
+	specific_heat = 0.549
+
 /datum/reagent/alcohol/butanol/affect_ingest(var/mob/living/carbon/human/M, var/alien, var/removed)
 	if(!istype(M))
 		return
@@ -240,6 +250,8 @@
 	touch_met = 5
 	taste_description = "sweet tasting metal"
 
+	specific_heat = 0.549 //Unknown
+
 /datum/reagent/hydrazine/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	M.adjustToxLoss(4 * removed)
 
@@ -260,6 +272,8 @@
 	color = "#353535"
 	taste_description = "metal"
 
+	specific_heat = 1.181
+
 /datum/reagent/iron/affect_ingest(var/mob/living/carbon/M, var/alien, var/removed)
 	M.add_chemical_effect(CE_BLOODRESTORE, 8 * removed)
 
@@ -271,6 +285,8 @@
 	color = "#808080"
 	taste_description = "metal"
 
+	specific_heat = 0.633
+
 /datum/reagent/lithium/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(M.canmove && !M.restrained() && !(istype(M.loc, /turf/space)))
 		step(M, pick(cardinal))
@@ -286,6 +302,8 @@
 	ingest_met = REM*0.2
 	taste_mult = 0 //mercury apparently is tasteless
 
+	specific_heat = 0.631
+
 /datum/reagent/mercury/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(M.canmove && !M.restrained() && !(istype(M.loc, /turf/space)))
 		step(M, pick(cardinal))
@@ -302,6 +320,8 @@
 	color = "#832828"
 	taste_description = "vinegar"
 
+	specific_heat = 0.569
+
 /datum/reagent/potassium
 	name = "Potassium"
 	id = "potassium"
@@ -310,6 +330,8 @@
 	color = "#A0A0A0"
 	taste_description = "sweetness" //potassium is bitter in higher doses but sweet in lower ones.
 
+	specific_heat = 0.214
+
 /datum/reagent/radium
 	name = "Radium"
 	id = "radium"
@@ -319,6 +341,8 @@
 	taste_description = "the color blue, and regret"
 	unaffected_species = IS_MACHINE
 
+	specific_heat = 0.220
+
 /datum/reagent/radium/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	M.apply_effect(10 * removed, IRRADIATE, blocked = 0) // Radium may increase your chances to cure a disease
 	if(M.is_diona())
@@ -361,6 +385,8 @@
 	var/meltdose = 10 // How much is needed to melt
 	taste_description = "acid"
 
+	specific_heat = 0.815
+
 /datum/reagent/acid/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	M.take_organ_damage(0, removed * power)
 
@@ -452,6 +478,8 @@
 	meltdose = 8
 	taste_description = "stomach acid"
 
+	specific_heat = 1.710
+
 /datum/reagent/acid/polyacid //Not in dispensers, but it should be here
 	name = "Polytrinic acid"
 	id = "pacid"
@@ -469,6 +497,7 @@
 	reagent_state = SOLID
 	color = "#A8A8A8"
 	taste_description = "metal"
+	specific_heat = 2.650
 
 /datum/reagent/sodium
 	name = "Sodium"
@@ -477,6 +506,7 @@
 	reagent_state = SOLID
 	color = "#808080"
 	taste_description = "salty metal"
+	specific_heat = 0.483
 
 /datum/reagent/sugar
 	name = "Sugar"
@@ -491,6 +521,8 @@
 	glass_name = "glass of sugar"
 	glass_desc = "The organic compound commonly known as table sugar and sometimes called saccharose. This white, odorless, crystalline powder has a pleasing, sweet taste."
 
+	specific_heat = 0.332
+
 /datum/reagent/sugar/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	M.adjustNutritionLoss(-removed*3)
 
@@ -500,7 +532,9 @@
 	description = "A chemical element with a pungent smell."
 	reagent_state = SOLID
 	color = "#BF8C00"
-	taste_description = "old eggs"
+	taste_description = "rotten eggs"
+
+	specific_heat = 0.503
 
 /datum/reagent/tungsten
 	name = "Tungsten"
@@ -509,3 +543,6 @@
 	reagent_state = SOLID
 	color = "#DCDCDC"
 	taste_mult = 0 //no taste
+	specific_heat = 18
+
+	specific_heat = 0.859

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Food-Drinks.dm

@@ -10,6 +10,7 @@
 	taste_description = "boiled cabbage"
 	unaffected_species = IS_MACHINE
 	var/kois_type = 1
+	specific_heat = 0.75
 
 /datum/reagent/kois/affect_ingest(var/mob/living/carbon/human/M, var/alien, var/removed)
 	if(!istype(M))
@@ -45,6 +46,7 @@
 	color = "#ece9dd"
 	taste_description = "cabbage soup"
 	kois_type = 0
+	specific_heat = 1
 
 /datum/reagent/kois/black
 	name = "Modified K'ois"
@@ -53,6 +55,7 @@
 	color = "#31004A"
 	taste_description = "tar"
 	kois_type = 2
+	specific_heat = 0.5
 
 /* Food */
 /datum/reagent/nutriment
@@ -72,6 +75,7 @@
 	color = "#664330"
 	unaffected_species = IS_MACHINE
 	taste_description = "food"
+	fallback_specific_heat = 1.25
 
 /datum/reagent/nutriment/synthetic
 	name = "Synthetic Nutriment"
@@ -537,12 +541,15 @@
 /datum/reagent/frostoil
 	name = "Frost Oil"
 	id = "frostoil"
-	description = "A special oil that noticably chills the body. Extracted from Ice Peppers."
+	description = "A special oil that chemically chills the body. Extracted from Ice Peppers."
 	reagent_state = LIQUID
 	color = "#B31008"
 	taste_description = "mint"
 	taste_mult = 1.5
 
+	specific_heat = 15
+	default_temperature = T0C - 20
+
 /datum/reagent/frostoil/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	M.bodytemperature = max(M.bodytemperature - 10 * TEMPERATURE_DAMAGE_COEFFICIENT, 0)
 	if(prob(1))
@@ -704,11 +711,12 @@
 	var/adj_dizzy = 0 // Per tick
 	var/adj_drowsy = 0
 	var/adj_sleepy = 0
-	var/adj_temp = 0
+	var/adj_temp = 0 //do NOT use for temp changes based on the temperature of the drinks, only for things such as spices.
 	var/caffeine = 0 // strength of stimulant effect, since so many drinks use it
 	var/datum/modifier/modifier = null
 	unaffected_species = IS_MACHINE
 	var/blood_to_ingest_scale = 2
+	fallback_specific_heat = 1.75
 
 /datum/reagent/drink/Destroy()
 	if (modifier)
@@ -930,6 +938,8 @@
 	glass_name = "glass of milk"
 	glass_desc = "White and nutritious goodness!"
 
+	default_temperature = T0C + 5
+
 /datum/reagent/drink/milk/affect_ingest(var/mob/living/carbon/M, var/alien, var/removed)
 	..()
 	if(alien != IS_DIONA)
@@ -965,7 +975,6 @@
 	adj_dizzy = -2
 	adj_drowsy = -1
 	adj_sleepy = -3
-	adj_temp = 20
 	taste_description = "tart black tea"
 
 	glass_icon_state = "bigteacup"
@@ -979,7 +988,6 @@
 	id = "icetea"
 	description = "No relation to a certain rap artist/ actor."
 	color = "#104038" // rgb: 16, 64, 56
-	adj_temp = -5
 	taste_description = "sweet tea"
 
 	glass_icon_state = "icedteaglass"
@@ -996,7 +1004,6 @@
 	adj_dizzy = -5
 	adj_drowsy = -3
 	adj_sleepy = -2
-	adj_temp = 25
 	overdose = 45
 	caffeine = 0.3
 	taste_description = "coffee"
@@ -1029,7 +1036,6 @@
 	id = "icecoffee"
 	description = "Coffee and ice, refreshing and cool."
 	color = "#102838"
-	adj_temp = -5
 
 	glass_icon_state = "frappe"
 	glass_name = "glass of frappe coffee"
@@ -1040,7 +1046,6 @@
 	id = "soy_latte"
 	description = "A nice and tasty beverage while you are reading your hippie books."
 	color = "#664300"
-	adj_temp = 5
 	taste_description = "creamy coffee"
 
 	glass_icon_state = "soy_latte"
@@ -1053,7 +1058,6 @@
 	id = "cafe_latte"
 	description = "A nice, strong and tasty beverage while you are reading."
 	color = "#664300" // rgb: 102, 67, 0
-	adj_temp = 5
 	taste_description = "bitter cream"
 
 	glass_icon_state = "cafe_latte"
@@ -1066,7 +1070,6 @@
 	id = "espresso"
 	description = "A strong coffee made by passing nearly boiling water through coffee seeds at high pressure."
 	color = "#664300" // rgb: 102, 67, 0
-	adj_temp = 5
 	taste_description = "bitter coffee"
 
 	glass_icon_state = "hot_coffee"
@@ -1079,7 +1082,6 @@
 	id = "freddo_espresso"
 	description = "Espresso with ice cubes poured over ice."
 	color = "#664300" // rgb: 102, 67, 0
-	adj_temp = 5
 	taste_description = "cold and bitter coffee"
 
 	glass_icon_state = "hot_coffee"
@@ -1092,7 +1094,6 @@
 	id = "caffe_americano"
 	description = "Espresso diluted with hot water."
 	color = "#664300" // rgb: 102, 67, 0
-	adj_temp = 5
 	taste_description = "delicious coffee"
 
 	glass_icon_state = "hot_coffee"
@@ -1105,7 +1106,6 @@
 	id = "flat_white"
 	description = "Espresso with a bit of steamy hot milk."
 	color = "#664300" // rgb: 102, 67, 0
-	adj_temp = 5
 	taste_description = "bitter coffee and milk"
 
 	glass_icon_state = "cafe_latte"
@@ -1118,7 +1118,6 @@
 	id = "latte"
 	description = "A nice, strong and refreshing beverage while you are reading."
 	color = "#664300" // rgb: 102, 67, 0
-	adj_temp = 5
 	taste_description = "bitter cream"
 
 	glass_icon_state = "cafe_latte"
@@ -1131,7 +1130,6 @@
 	id = "cappuccino"
 	description = "Espresso with steamed milk foam."
 	color = "#664300" // rgb: 102, 67, 0
-	adj_temp = 5
 	taste_description = "bitter milk foam"
 
 	glass_icon_state = "hot_coffee"
@@ -1144,7 +1142,6 @@
 	id = "freddo_cappuccino"
 	description = "Espresso with steamed milk foam, on ice."
 	color = "#664300" // rgb: 102, 67, 0
-	adj_temp = 5
 	taste_description = "cold and bitter milk foam"
 
 	glass_icon_state = "hot_coffee"
@@ -1157,7 +1154,6 @@
 	id = "macchiato"
 	description = "Espresso with milk foam."
 	color = "#664300" // rgb: 102, 67, 0
-	adj_temp = 5
 	taste_description = "bitter milk foam"
 
 	glass_icon_state = "hot_coffee"
@@ -1170,7 +1166,6 @@
 	id = "mocacchino"
 	description = "Espresso with hot milk and chocolate."
 	color = "#664300" // rgb: 102, 67, 0
-	adj_temp = 5
 	taste_description = "sweet milk and bitter coffee"
 
 	glass_icon_state = "cafe_latte"
@@ -1218,7 +1213,6 @@
 	reagent_state = LIQUID
 	color = "#403010"
 	nutrition = 2
-	adj_temp = 5
 	taste_description = "creamy chocolate"
 
 	glass_icon_state = "chocolateglass"
@@ -1232,7 +1226,6 @@
 	color = "#619494"
 	adj_dizzy = -5
 	adj_drowsy = -3
-	adj_temp = -5
 	taste_description = "carbonated water"
 
 	glass_icon_state = "glass_clear"
@@ -1259,7 +1252,6 @@
 	adj_dizzy = -5
 	adj_drowsy = -3
 	adj_sleepy = -2
-	adj_temp = -5
 	taste_description = "tart and fresh"
 
 	glass_icon_state = "glass_clear"
@@ -1271,7 +1263,6 @@
 	description = "Oh the nostalgia..."
 	id = "lemonade"
 	color = "#FFFF00"
-	adj_temp = -5
 	taste_description = "tartness"
 
 	glass_icon_state = "lemonadeglass"
@@ -1283,7 +1274,6 @@
 	description = "Long live the guy who everyone had mistaken for a girl. Baka!"
 	id = "kiraspecial"
 	color = "#CCCC99"
-	adj_temp = -5
 	taste_description = "fruity sweetness"
 
 	glass_icon_state = "kiraspecial"
@@ -1296,7 +1286,6 @@
 	description = "It's not what it sounds like..."
 	id = "brownstar"
 	color = "#9F3400"
-	adj_temp = -2
 	taste_description = "orange and cola soda"
 
 	glass_icon_state = "brownstar"
@@ -1320,7 +1309,6 @@
 	description = "Glorious brainfreezing mixture."
 	id = "milkshake"
 	color = "#AEE5E4"
-	adj_temp = -9
 	taste_description = "creamy vanilla"
 
 	glass_icon_state = "milkshake"
@@ -1333,7 +1321,6 @@
 	description = "The secret of the sanctuary of the Libarian..."
 	id = "rewriter"
 	color = "#485000"
-	adj_temp = -5
 	caffeine = 0.4
 	taste_description = "soda and coffee"
 
@@ -1352,7 +1339,6 @@
 	id = "nuka_cola"
 	description = "Cola, cola never changes."
 	color = "#100800"
-	adj_temp = -5
 	adj_sleepy = -2
 	caffeine = 1
 	taste_description = "cola"
@@ -1390,7 +1376,6 @@
 	reagent_state = LIQUID
 	color = "#100800"
 	adj_drowsy = -3
-	adj_temp = -5
 	taste_description = "cola"
 
 	glass_icon_state  = "glass_brown"
@@ -1404,7 +1389,6 @@
 	color = "#102000"
 	adj_drowsy = -7
 	adj_sleepy = -1
-	adj_temp = -5
 	taste_description = "sweet citrus soda"
 
 	glass_icon_state = "Space_mountain_wind_glass"
@@ -1417,7 +1401,6 @@
 	description = "A delicious blend of 42 different flavours"
 	color = "#102000"
 	adj_drowsy = -6
-	adj_temp = -5
 	taste_description = "cherry soda"
 
 	glass_icon_state = "dr_gibb_glass"
@@ -1430,7 +1413,6 @@
 	description = "A classic Earth drink from the United Americas province."
 	color = "#211100"
 	adj_drowsy = -6
-	adj_temp = -5
 	taste_description = "sassafras and anise soda"
 
 	glass_icon_state = "root_beer_glass"
@@ -1442,7 +1424,6 @@
 	id = "space_up"
 	description = "Tastes like a hull breach in your mouth."
 	color = "#202800"
-	adj_temp = -8
 	taste_description = "a hull breach"
 
 	glass_icon_state = "space-up_glass"
@@ -1454,7 +1435,6 @@
 	description = "A tangy substance made of 0.5% natural citrus!"
 	id = "lemon_lime"
 	color = "#878F00"
-	adj_temp = -8
 	taste_description = "tangy lime and lemon soda"
 
 	glass_icon_state = "lemonlime"
@@ -1517,10 +1497,7 @@
 	nutrition = 5
 	hydration = 5
 	taste_description = "wet and cheap noodles on fire"
-
-/datum/reagent/drink/hell_ramen/affect_ingest(var/mob/living/carbon/M, var/alien, var/removed)
-	..()
-	M.bodytemperature += 10 * TEMPERATURE_DAMAGE_COEFFICIENT
+	adj_temp = 20
 
 /datum/reagent/drink/ice
 	name = "Ice"
@@ -1528,7 +1505,6 @@
 	description = "Frozen water, your dentist wouldn't like you chewing this."
 	reagent_state = SOLID
 	color = "#619494"
-	adj_temp = -5
 	taste_description = "ice"
 	taste_mult = 1.5
 	hydration = 8
@@ -1537,6 +1513,8 @@
 	glass_name = "glass of ice"
 	glass_desc = "Generally, you're supposed to put something else in there too..."
 
+	default_temperature = T0C - 10
+
 /datum/reagent/drink/nothing
 	name = "Nothing"
 	id = "nothing"
@@ -2342,7 +2320,6 @@
 	description = "A beer which is so cold the air around it freezes."
 	color = "#664300"
 	strength = 5
-	adj_temp = -20
 	targ_temp = 270
 	taste_description = "refreshingly cold"
 
@@ -2868,8 +2845,6 @@
 	id = "dr_gibb_diet"
 	description = "A delicious blend of 42 different flavours, one of which is water."
 	color = "#102000"
-
-	adj_temp = -5
 	taste_description = "watered down liquid sunshine"
 
 	glass_icon_state = "dr_gibb_glass"
@@ -2881,7 +2856,6 @@
 	id = "dr_daniels"
 	description = "A limited edition tallboy of Dr. Gibb's Infusions."
 	color = "#8e6227"
-	adj_temp = -5
 	caffeine = 0.2
 	overdose = 80
 	strength = 20
@@ -3468,7 +3442,6 @@
 	color = "#664300"
 	strength = 15
 	taste_description = "cold oily gin"
-	adj_temp = -15
 	targ_temp = 270
 
 	glass_icon_state = "winter_offensive"
@@ -3692,7 +3665,6 @@
 	id = "zora_cherry"
 	description = "Zo'ra Soda, cherry edition. All good drinks come in cherry."
 	color = "#102000"
-	adj_temp = -5
 	adj_sleepy = -2
 	caffeine = 0.2
 	taste_description = "electric cherry"
@@ -3702,7 +3674,6 @@
 	id = "zora_phoron"
 	description = "Reported to taste nothing like phoron, but everything like grapes."
 	color = "#863333"
-	adj_temp = -5
 	adj_sleepy = -2
 	caffeine = 0.2
 	taste_description = "electric grape"
@@ -3712,7 +3683,6 @@
 	id = "zora_kois"
 	description = "Whoever approved this in marketing needs to be drawn and quartered."
 	color = "#dcd9cd"
-	adj_temp = -5
 	adj_sleepy = -2
 	caffeine = 0.2
 	taste_description = "sugary cabbage"
@@ -3727,7 +3697,6 @@
 	id = "zora_hozm"
 	description = "It feels like someone is just driving a freezing cold spear through the bottom of your mouth."
 	color = "#365000"
-	adj_temp = -5
 	adj_sleepy = -3
 	caffeine = 0.3
 	taste_description = "a full-body bite into an acidic lemon"
@@ -3744,7 +3713,6 @@
 	id = "zora_venom"
 	description = "The 'diet' version of High Energy Zorane Might, still tastes like a cloud of stinging polytrinic bees."
 	color = "#100800"
-	adj_temp = -5
 	adj_sleepy = -3
 	caffeine = 0.1
 	taste_description = "fizzy nettles"
@@ -3759,7 +3727,6 @@
 	id = "zora_klax"
 	description = "An orange, cream soda. It's a wonder it got here."
 	color = "#E78108"
-	adj_temp = -5
 	adj_sleepy = -3
 	caffeine = 0.2
 	unaffected_species = IS_MACHINE
@@ -3775,7 +3742,6 @@
 	id = "zora_cthur"
 	description = "A raspberry concoction you're pretty sure is already on recall."
 	color = "#0000CD"
-	adj_temp = -5
 	adj_sleepy = -3
 	caffeine = 0.2
 	taste_description = "flat raspberry"
@@ -3790,7 +3756,6 @@
 	id = "zora_drone"
 	description = "It's thick as syrup and smells of gas. Why."
 	color = "#31004A"
-	adj_temp = -5
 	adj_sleepy = -3
 	taste_description = "viscous cola"
 
@@ -3815,7 +3780,6 @@
 	id = "zora_jelly"
 	description = "It looks of mucus, but tastes like Heaven."
 	color = "#FFFF00"
-	adj_temp = -5
 	adj_sleepy = -3
 	caffeine = 0.2
 	taste_description = "a reassuring spectrum of color"

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Medicine.dm

@@ -142,7 +142,7 @@
 /datum/reagent/tricordrazine
 	name = "Tricordrazine"
 	id = "tricordrazine"
-	description = "Tricordrazine is a highly potent stimulant, originally derived from cordrazine. Can be used to treat a wide range of injuries, however it does not work when inhaled."
+	description = "Tricordrazine is a highly potent stimulant, originally derived from cordrazine. Can be used to treat a wide range of injuries, however it does not work when inhaled. Has different healing properties depending on the chemical's temperature."
 	reagent_state = LIQUID
 	color = "#8040FF"
 	scannable = 1
@@ -150,8 +150,11 @@
 	breathe_mul = 0
 
 /datum/reagent/tricordrazine/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
+	var/power = 1 + Clamp((get_temperature() - (T0C + 20))*0.1,-0.5,0.5)
+	//Heals 10% more brute and less burn for every 1 celcius above 20 celcius, up 50% more/less.
+	//Heals 10% more burn and less brute for every 1 celcius below 20 celcius, up to 50% more/less.
 	M.adjustOxyLoss(-6 * removed)
-	M.heal_organ_damage(3 * removed, 3 * removed)
+	M.heal_organ_damage(3 * removed * power,3 * removed * power)
 	M.adjustToxLoss(-3 * removed)
 
 /datum/reagent/cryoxadone
@@ -174,7 +177,7 @@
 /datum/reagent/clonexadone
 	name = "Clonexadone"
 	id = "clonexadone"
-	description = "A liquid compound similar to that used in the cloning process. Can be used to 'finish' the cloning process when used in conjunction with a cryo tube."
+	description = "A liquid compound similar to that used in the cloning process. Can be used to 'finish' the cloning process when used in conjunction with a cryo tube. Its main limitation is that the targets body temperature must be under 170K for it to metabolise correctly."
 	reagent_state = LIQUID
 	color = "#80BFFF"
 	metabolism = REM * 0.5

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Other.dm

@@ -8,6 +8,7 @@
 	color = "#888888"
 	overdose = 5
 	taste_description = "the back of class"
+	specific_heat = 0.4
 
 /datum/reagent/crayon_dust/red
 	name = "Red crayon dust"
@@ -58,6 +59,7 @@
 	overdose = REAGENTS_OVERDOSE * 0.5
 	color_weight = 20
 	taste_description = "chalk"
+	specific_heat = 0.2
 
 /datum/reagent/paint/touch_turf(var/turf/T)
 	if(istype(T) && !istype(T, /turf/space))
@@ -82,6 +84,7 @@
 		O.color = color
 
 /datum/reagent/paint/touch_mob(var/mob/M)
+	. = ..()
 	if(istype(M) && !istype(M, /mob/abstract)) //painting ghosts: not allowed
 		M.color = color //maybe someday change this to paint only clothes and exposed body parts for human mobs.
 
@@ -123,7 +126,7 @@
 /datum/reagent/adminordrazine //An OP chemical for admins
 	name = "Adminordrazine"
 	id = "adminordrazine"
-	description = "It's magic. We don't have to explain it."
+	description = "It's magic, I ain't gotta explain shit."
 	reagent_state = LIQUID
 	color = "#C8A5DC"
 	affects_dead = 1 //This can even heal dead people.
@@ -131,7 +134,10 @@
 
 	glass_icon_state = "golden_cup"
 	glass_name = "golden cup"
-	glass_desc = "It's magic. We don't have to explain it."
+	glass_desc = "It's magic, I ain't gotta explain shit."
+
+	specific_heat = 10 //Magical.
+
 
 /datum/reagent/adminordrazine/affect_touch(var/mob/living/carbon/M, var/alien, var/removed)
 	affect_blood(M, alien, removed)
@@ -172,6 +178,7 @@
 	reagent_state = SOLID
 	color = "#F7C430"
 	taste_description = "expensive metal"
+	specific_heat = 2.511
 
 /datum/reagent/silver
 	name = "Silver"
@@ -180,6 +187,7 @@
 	reagent_state = SOLID
 	color = "#D0D0D0"
 	taste_description = "expensive yet reasonable metal"
+	specific_heat = 0.241
 
 /datum/reagent/uranium
 	name ="Uranium"
@@ -188,6 +196,7 @@
 	reagent_state = SOLID
 	color = "#B8B8C0"
 	taste_description = "the inside of a reactor"
+	specific_heat = 2.286
 
 /datum/reagent/uranium/affect_touch(var/mob/living/carbon/M, var/alien, var/removed)
 	affect_ingest(M, alien, removed)
@@ -210,6 +219,7 @@
 	reagent_state = SOLID
 	color = "#E0E0E0"
 	taste_description = "salty metalic miner tears"
+	specific_heat = 0.2971
 
 /datum/reagent/adrenaline
 	name = "Adrenaline"
@@ -218,6 +228,7 @@
 	reagent_state = LIQUID
 	color = "#C8A5DC"
 	taste_description = "bitterness"
+	specific_heat = 0.75
 
 /datum/reagent/adrenaline/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	M.SetParalysis(0)
@@ -290,6 +301,7 @@
 	taste_description = "sweet tasting metal"
 
 /datum/reagent/thermite/touch_turf(var/turf/T)
+	. = ..()
 	if(volume >= 5)
 		if(istype(T, /turf/simulated/wall))
 			var/turf/simulated/wall/W = T
@@ -422,6 +434,7 @@
 	description = "An extremely powerful bonding agent."
 	color = "#FFFFCC"
 	taste_description = "a special education class"
+	fallback_specific_heat = 1.5
 
 /datum/reagent/woodpulp
 	name = "Wood Pulp"
@@ -430,6 +443,7 @@
 	reagent_state = LIQUID
 	color = "#B97A57"
 	taste_description = "wood"
+	fallback_specific_heat = 1.9
 
 /datum/reagent/luminol
 	name = "Luminol"
@@ -439,10 +453,27 @@
 	color = "#F2F3F4"
 	taste_description = "metal"
 
+/datum/reagent/pyrosilicate
+	name = "Pyrosilicate"
+	id = "pyrosilicate"
+	description = "A bright orange powder consisting of strange self-heating properties that reacts when exposed to sodium chloride."
+	reagent_state = SOLID
+	color = "#FFFF00"
+	taste_description = "chalk"
+
+/datum/reagent/cryosurfactant
+	name = "Cryosurfactant"
+	id = "cryosurfactant"
+	description = "A bright cyan liquid consisting of strange self-cooling properties that reacts when exposed to water."
+	reagent_state = LIQUID
+	color = "#00FFFF"
+	taste_description = "needles"
+
 /datum/reagent/luminol/touch_obj(var/obj/O)
 	O.reveal_blood()
 
 /datum/reagent/luminol/touch_mob(var/mob/living/L)
+	. = ..()
 	L.reveal_blood()
 
 /datum/reagent/estus
@@ -455,6 +486,7 @@
 	metabolism = REM * 0.25
 	taste_description = "bottled fire"
 	var/datum/modifier/modifier
+	fallback_specific_heat = 2.75
 
 /datum/reagent/estus/affect_blood(var/mob/living/carbon/M, var/removed)
 	if (!modifier)
@@ -482,8 +514,10 @@
 	color = "#E25822"
 	touch_met = 5
 	taste_description = "metal"
+	fallback_specific_heat = 20 //This holds a ton of heat.
 
 /datum/reagent/liquid_fire/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
+	. = ..()
 	if(istype(M))
 		M.adjust_fire_stacks(10)
 		M.IgniteMob()
@@ -499,6 +533,7 @@
 	description = "A pitch black blend of cosmic origins, handle with care."
 	color = "#000000"
 	taste_description = "emptyness"
+	fallback_specific_heat = 100 //Yeah...
 
 /datum/reagent/black_matter/touch_turf(var/turf/T)
 	var/obj/effect/portal/P = new /obj/effect/portal(T)
@@ -522,6 +557,7 @@
 	description = "A dust composed of microscopic bluespace crystals."
 	color = "#1f8999"
 	taste_description = "fizzling blue"
+	fallback_specific_heat = 0.1
 
 /datum/reagent/bluespace_dust/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(prob(25))
@@ -532,6 +568,7 @@
 		do_teleport(M, get_turf(M), 5, asoundin = 'sound/effects/phasein.ogg')
 
 /datum/reagent/bluespace_dust/touch_mob(var/mob/living/L, var/amount)
+	. = ..()
 	do_teleport(L, get_turf(L), amount, asoundin = 'sound/effects/phasein.ogg')
 
 /datum/reagent/philosopher_stone
@@ -540,6 +577,7 @@
 	description = "A mythical compound, rumored to be the catalyst of fantastic reactions."
 	color = "#f4c430"
 	taste_description = "heavenly knowledge"
+	fallback_specific_heat = 1.25
 
 /datum/reagent/sglue
 	name = "Sovereign Glue"
@@ -548,6 +586,7 @@
 	reagent_state = LIQUID
 	color = "#EDE8E2"
 	taste_description = "horses"
+	fallback_specific_heat = 1.25
 
 /datum/reagent/sglue/touch_obj(var/obj/O)
 	if((istype(O, /obj/item) && !istype(O, /obj/item/weapon/reagent_containers)) && (volume > 10*O.w_class))
@@ -564,6 +603,7 @@
 	reagent_state = LIQUID
 	color = "#EDE8E2"
 	taste_description = "alcohol"
+	fallback_specific_heat = 1.75
 
 /datum/reagent/usolve/touch_obj(var/obj/O)
 	if((istype(O, /obj/item) && !istype(O, /obj/item/weapon/reagent_containers)) && (volume > 10*O.w_class))
@@ -580,6 +620,7 @@
 	reagent_state = SOLID
 	color = "#c2b280"
 	taste_description = "sand"
+	fallback_specific_heat = 0.75
 
 /datum/reagent/shapesand/touch_obj(var/obj/O)
 	if((istype(O, /obj/item) && !istype(O, /obj/item/weapon/reagent_containers)) && (volume > 10*O.w_class))
@@ -616,6 +657,7 @@
 	reagent_state = LIQUID
 	color = "#ff69b4"
 	taste_description = "sickly sweet candy"
+	fallback_specific_heat = 2 //Thicc
 
 /datum/reagent/love_potion/affect_blood(var/mob/living/carbon/human/H, var/alien, var/removed)
 
@@ -633,6 +675,7 @@
 	reagent_state = LIQUID
 	color = "#70838A"
 	taste_description = "metal"
+	fallback_specific_heat = 10
 
 /datum/reagent/bottle_lightning/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(prob(25))

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Toxins.dm

@@ -10,6 +10,7 @@
 	var/strength = 4 // How much damage it deals per unit
 	taste_description = "bitterness"
 	taste_mult = 1.2
+	fallback_specific_heat = 0.75
 
 /datum/reagent/toxin/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(strength)
@@ -69,6 +70,7 @@
 	touch_met = 5
 	taste_mult = 1.5
 	breathe_mul = 2
+	specific_heat = 2 //Phoron is very dense and can hold a lot of energy.
 
 /datum/reagent/toxin/phoron/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(ishuman(M))
@@ -101,10 +103,8 @@
 	else
 		..()
 
-
-
-
 /datum/reagent/toxin/phoron/touch_mob(var/mob/living/L, var/amount)
+	. = ..()
 	if(istype(L))
 		L.adjust_fire_stacks(amount / 5)
 
@@ -125,6 +125,14 @@
 	T.assume_gas("phoron", volume, T20C)
 	remove_self(volume)
 
+/datum/reagent/toxin/phoron_salt //Remember to exclude in RNG chems.
+	name = "Phoron Salts"
+	id = "phoron_salt"
+	description = "A mysterious molten mixture with strange chemical properties."
+	reagent_state = SOLID
+	color = "#7C4876"
+	strength = 30
+
 /datum/reagent/toxin/cardox
 	name = "Cardox"
 	id = "cardox"
@@ -305,6 +313,7 @@
 	return
 
 /datum/reagent/toxin/fertilizer/monoammoniumphosphate/touch_mob(var/mob/living/L, var/amount)
+	. = ..()
 	if(istype(L))
 		var/needed = L.fire_stacks * 10
 		if(amount > needed)

code/modules/reagents/Chemistry-Recipes.dm

@@ -7,7 +7,7 @@
 //HALF_LIFE(0) -> Reaction completes immediately (default chems)
 //HALF_LIFE(1) -> Half of the reagents react immediately, the rest over the following ticks.
 //HALF_LIFE(2) -> Half of the reagents are consumed after 2 chemistry ticks.
-//HALF_LIFE(3) -> Half of the reagents are consumed after 3 chemistry ticks.
+//HALF_LIFE(2.2) -> Half of the reagents are consumed after 2.2 chemistry ticks.
 #define HALF_LIFE(ticks) (ticks? 1.0 - (0.5)**(1.0/(ticks*PROCESS_REACTION_ITER)) : 1.0)
 
 /datum/chemical_reaction
@@ -15,6 +15,8 @@
 	var/id = null
 	var/result = null
 	var/list/required_reagents = list()
+	var/list/required_temperatures_min = list() //Format: reagent name = required_kelvin. Temperatures must exceed this value to trigger.
+	var/list/required_temperatures_max = list() //Format: reagent name = required_kelvin. Temperatures must be less than this value to trigger.
 	var/list/catalysts = list()
 	var/list/inhibitors = list()
 	var/result_amount = 0
@@ -47,6 +49,9 @@
 	if(holder.has_any_reagent(inhibitors))
 		return 0
 
+	if(!holder.has_all_temperatures(required_temperatures_min, required_temperatures_max))
+		return 0
+
 	return 1
 
 /datum/chemical_reaction/proc/calc_reaction_progress(var/datum/reagents/holder, var/reaction_limit)
@@ -93,32 +98,37 @@
 	var/data = send_data(holder, reaction_progress)
 
 	//remove the reactants
+	var/total_thermal_energy = 0
 	for(var/reactant in required_reagents)
 		var/amt_used = required_reagents[reactant] * reaction_progress
+		var/datum/reagent/removing_reagent = holder.get_reagent(reactant)
+		total_thermal_energy += removing_reagent.get_thermal_energy() * (amt_used / removing_reagent.volume)
 		holder.remove_reagent(reactant, amt_used, safety = 1)
 
 	//add the product
 	var/amt_produced = result_amount * reaction_progress
 	if(result)
-		holder.add_reagent(result, amt_produced, data, safety = 1)
+		holder.add_reagent(result, amt_produced, data, safety = 1, thermal_energy = total_thermal_energy)
 
-	on_reaction(holder, amt_produced)
+	on_reaction(holder, amt_produced, total_thermal_energy)
 
 	return reaction_progress
 
 //called when a reaction processes
-/datum/chemical_reaction/proc/on_reaction(var/datum/reagents/holder, var/created_volume)
+/datum/chemical_reaction/proc/on_reaction(var/datum/reagents/holder, var/created_volume, var/created_thermal_energy)
 	return
 
 //called after processing reactions, if they occurred
 /datum/chemical_reaction/proc/post_reaction(var/datum/reagents/holder)
 	var/atom/container = holder.my_atom
-	if(mix_message && container && !ismob(container))
+	if(container && !ismob(container))
 		var/turf/T = get_turf(container)
-		var/list/seen = viewers(4, T)
-		for(var/mob/M in seen)
-			M.show_message("<span class='notice'>\icon[container] [mix_message]</span>", 1)
-		playsound(T, reaction_sound, 80, 1)
+		if(mix_message)
+			var/list/seen = viewers(4, T)
+			for(var/mob/M in seen)
+				M.show_message("<span class='notice'>\icon[container] [mix_message]</span>", 1)
+		if(reaction_sound)
+			playsound(T, reaction_sound, 80, 1)
 
 //obtains any special data that will be provided to the reaction products
 //this is called just before reactants are removed.
@@ -252,9 +262,9 @@
 	name = "Peridaxon"
 	id = "peridaxon"
 	result = "peridaxon"
-	required_reagents = list("bicaridine" = 2, "clonexadone" = 2)
+	required_reagents = list("bicaridine" = 1, "clonexadone" = 1)
 	catalysts = list("phoron" = 5)
-	result_amount = 2
+	result_amount = 1
 
 /datum/chemical_reaction/virus_food
 	name = "Virus Food"
@@ -2867,3 +2877,125 @@
 	for(var/i = 1, i <= created_volume, i++)
 		new /obj/item/stack/material/diamond(location)
 	return
+
+//Temperature Additions
+/datum/chemical_reaction/water_to_ice
+	name = "Water to Ice"
+	id = "water_to_ice"
+	result = "ice"
+	required_reagents = list("water" = 1)
+	required_temperatures_max = list("water" = T0C - 1)
+	result_amount = 0.5
+	mix_message = ""
+	reaction_sound = ""
+
+/datum/chemical_reaction/ice_to_water
+	name = "Ice to Water"
+	id = "ice_to_water"
+	result = "water"
+	required_reagents = list("ice" = 1)
+	required_temperatures_min = list("ice" = T0C + 1)
+	result_amount = 2
+	reaction_rate = HALF_LIFE(4) //CONFIRMED?
+	mix_message = ""
+	reaction_sound = ""
+
+/datum/chemical_reaction/phoron_salt //Safe temperatures for phoron salt is between 0 degress celcius and 200 celcius.
+	name = "Phoron Salt"
+	id = "phoron_salt"
+	result = "phoron_salt"
+	required_reagents = list("sodiumchloride" = 1, "phoron" = 2)
+	required_temperatures_min = list("sodiumchloride" = T0C + 200, "phoron" = T0C - 200)
+	required_temperatures_max = list("phoron" = T0C - 5)
+	result_amount = 1
+
+/datum/chemical_reaction/pyrosilicate
+	name = "Pyrosilicate"
+	id = "pyrosilicate"
+	result = "pyrosilicate"
+	result_amount = 4
+	required_reagents = list("silicate" = 1, "sacid" = 1, "hydrazine" = 1, "iron" = 1)
+
+/datum/chemical_reaction/cryosurfactant
+	name = "Cryosurfactant"
+	id = "cryosurfactant"
+	result = "cryosurfactant"
+	result_amount = 3
+	required_reagents = list("surfactant" = 1, "ice" = 1, "sodium" = 1)
+
+/datum/chemical_reaction/cryosurfactant_cooling
+	name = "Cryosurfactant Cooling"
+	id = "cryosurfactant_cooling"
+	result = null
+	result_amount = 1
+	required_reagents = list("cryosurfactant" = 1)
+	inhibitors = list("pyrosilicate" = 1)
+	catalysts = list("water" = 1)
+
+/datum/chemical_reaction/cryosurfactant_cooling/on_reaction(var/datum/reagents/holder, var/created_volume)
+	holder.add_thermal_energy(-created_volume*500)
+
+/datum/chemical_reaction/pyrosilicate_heating
+	name = "Pyrosilicate Heating"
+	id = "pyrosilicate_heating"
+	result = null
+	result_amount = 1
+	required_reagents = list("pyrosilicate" = 1)
+	inhibitors = list("cryosurfactant" = 1)
+	catalysts = list("sodiumchloride" = 1)
+
+/datum/chemical_reaction/pyrosilicate_heating/on_reaction(var/datum/reagents/holder, var/created_volume)
+	holder.add_thermal_energy(created_volume*1000)
+
+/datum/chemical_reaction/pyrosilicate_cryosurfactant
+	name = "Pyrosilicate Cryosurfactant Reaction"
+	id = "pyrosilicate_cryosurfactant"
+	result = null
+	required_reagents = list("pyrosilicate" = 1, "cryosurfactant" = 1)
+	required_temperatures_min = list("pyrosilicate" = T0C, "cryosurfactant" = T0C) //Does not react when below these temperatures.
+	result_amount = 1
+
+/datum/chemical_reaction/pyrosilicate_cryosurfactant/on_reaction(var/datum/reagents/holder, var/created_volume, var/created_thermal_energy)
+	if(created_volume)
+		var/turf/simulated/floor/T = get_turf(holder.my_atom.loc)
+		if(istype(T))
+			T.assume_gas("oxygen", created_volume*10, (created_thermal_energy/created_volume) )
+
+/datum/chemical_reaction/phoron_salt_fire
+	name = "Phoron Salt Fire"
+	id = "phoron_salt_fire"
+	result = "carbon"
+	result_amount = 1
+	required_reagents = list("phoron_salt" = 1)
+	required_temperatures_min = list("phoron_salt" = T0C + 200)
+
+/datum/chemical_reaction/phoron_salt_fire/on_reaction(var/datum/reagents/holder, var/created_volume, var/created_thermal_energy)
+	var/turf/location = get_turf(holder.my_atom.loc)
+	for(var/turf/simulated/floor/target_tile in range(0,location))
+		target_tile.assume_gas("phoron", created_volume*0.5, created_thermal_energy/created_volume) //The goal here is to hold as much thermal energy as possible with a large amount of volume.
+		target_tile.assume_gas("carbon_dioxide", created_volume*0.5, (created_thermal_energy/created_volume) )
+		addtimer(CALLBACK(target_tile, /turf/simulated/floor/.proc/hotspot_expose, 700, 400), 1)
+	holder.del_reagent("phoron_salt")
+	return
+
+/datum/chemical_reaction/phoron_salt_coldfire
+	name = "Phoron Salt Coldfire"
+	id = "phoron_salt_coldfire"
+	result = "hydrazine"
+	result_amount = 1
+	required_reagents = list("phoron_salt" = 1)
+	required_temperatures_max = list("phoron_salt" = T0C + 0)
+
+/datum/chemical_reaction/phoron_salt_coldfire/on_reaction(var/datum/reagents/holder, var/created_volume, var/created_thermal_energy)
+	var/datum/effect/effect/system/reagents_explosion/e = new()
+	var/explosion_mod = (holder.get_thermal_energy() + created_thermal_energy) * 0.001 //The more thermal energy inside a container, the bigger the explosion.
+	explosion_mod = Clamp(explosion_mod,1,32) //Let it be known that not even the dev who made this knows the full destuctive potential of this fuckery, so a maxcap of 32 is implemented.
+	e.set_up(round (explosion_mod, 1), holder.my_atom, 0, 0)
+	if(isliving(holder.my_atom))
+		e.amount *= 0.5
+		var/mob/living/L = holder.my_atom
+		if(L.stat != DEAD)
+			e.amount *= 0.5
+	e.start()
+	holder.clear_reagents()
+	return

code/modules/reagents/Chemistry-Temperature.dm

@@ -0,0 +1,125 @@
+//Everything to do with reagents having temperature. Override reagent procs to make your own snowflake special reagent with mystical properties.
+// https://www.aqua-calc.com/calculate/volume-to-weight/substance/
+// https://www.engineeringtoolbox.com/specific-heat-fluids-d_151.html USE THE TABLE ON THE LEFT
+// https://www.engineeringtoolbox.com/specific-heat-solids-d_154.html USE THE TABLE ON THE RIGHT
+// http://www2.ucdsb.on.ca/tiss/stretton/database/specific_heat_capacity_table.html
+// https://www.nuclear-power.net/radium-specific-heat-latent-heat-vaporization-fusion/
+
+/datum/reagents/proc/get_thermal_energy()
+	var/returning = 0
+	for(var/datum/reagent/R in reagent_list)
+		returning += R.get_thermal_energy()
+	return returning
+
+/datum/reagent/proc/get_thermal_energy()
+	return thermal_energy
+
+/datum/reagents/proc/get_heat_capacity()
+	var/returning = 0
+	for(var/datum/reagent/R in reagent_list)
+		if(total_volume)
+			returning += R.get_heat_capacity()
+	return returning
+
+/datum/reagent/proc/get_heat_capacity()
+	return specific_heat * volume
+
+/datum/reagents/proc/get_temperature()
+	var/HC = get_heat_capacity()
+	if(HC)
+		return get_thermal_energy() / (HC)
+	else
+		return T0C + 20
+
+/datum/reagent/proc/get_temperature()
+	var/HC = get_heat_capacity()
+	if(HC)
+		return get_thermal_energy() / (HC)
+	else
+		return T0C + 20
+
+/datum/reagents/proc/get_thermal_energy_change(var/old_temperature, var/new_temperature)
+	return get_heat_capacity()*(max(new_temperature, TCMB) - old_temperature)
+
+/datum/reagent/proc/get_thermal_energy_change(var/old_temperature, var/new_temperature)
+	return get_heat_capacity()*(max(new_temperature, TCMB) - old_temperature)
+
+/datum/reagent/proc/get_thermal_energy_per_unit()
+	return get_thermal_energy() / volume
+
+/datum/reagent/proc/add_thermal_energy(var/added_energy)
+	thermal_energy += added_energy
+	return added_energy
+
+/datum/reagent/proc/set_thermal_energy(var/set_energy)
+	return add_thermal_energy(-get_thermal_energy() + set_energy)
+
+/datum/reagents/proc/set_thermal_energy(var/set_energy)
+	return add_thermal_energy(-get_thermal_energy() + set_energy)
+
+/datum/reagent/proc/set_temperature(var/new_temperature)
+	return add_thermal_energy(-get_thermal_energy() + get_thermal_energy_change(0,new_temperature) )
+
+/datum/reagents/proc/set_temperature(var/new_temperature)
+	return add_thermal_energy(-get_thermal_energy() + get_thermal_energy_change(0,new_temperature) )
+
+/datum/reagents/proc/equalize_thermal_energy()
+	var/thermal_energy_to_add = get_thermal_energy()
+	for(var/datum/reagent/R in reagent_list)
+		R.add_thermal_energy(-R.get_thermal_energy() + (thermal_energy_to_add * (1/reagent_list.len)) )
+
+/datum/reagents/proc/equalize_temperature()
+
+	var/total_thermal_energy = 0
+	var/total_heat_capacity = 0
+
+	for(var/datum/reagent/R in reagent_list)
+		total_thermal_energy += R.get_thermal_energy()
+		total_heat_capacity += R.get_heat_capacity()
+
+	for(var/datum/reagent/R in reagent_list)
+		R.set_thermal_energy( total_thermal_energy * (R.get_heat_capacity()/total_heat_capacity) )
+
+/datum/reagents/proc/add_thermal_energy(var/thermal_energy_to_add)
+	var/total_energy_added = 0
+	for(var/datum/reagent/R in reagent_list)
+		total_energy_added += R.add_thermal_energy(thermal_energy_to_add * (1/reagent_list.len))
+
+	return total_energy_added
+
+/*
+/datum/reagents/proc/add_thermal_energy(var/thermal_energy_to_add)
+
+	if (total_volume == 0)
+		return 0
+
+	var/returning_energy_used = 0
+
+	for(var/datum/reagent/R in reagent_list)
+		var/local_thermal_energy = thermal_energy_to_add / reagent_list.len
+		if (local_thermal_energy < 0)
+			if (R.get_temperature() < TCMB)
+				return 0
+			var/thermal_energy_limit = -(R.get_temperature() - TCMB) * R.get_heat_capacity()	//ensure temperature does not go below TCMB
+			local_thermal_energy = max( local_thermal_energy, thermal_energy_limit )	//thermal_energy and thermal_energy_limit are negative here.
+		returning_energy_used += R.add_thermal_energy(local_thermal_energy)
+
+	return returning_energy_used
+*/
+
+/datum/reagents/proc/has_all_temperatures(var/list/required_temperatures_min, var/list/required_temperatures_max)
+
+	for(var/datum/reagent/current in reagent_list)
+		if(current.id in required_temperatures_min) //The current temperature must be greater than this temperature
+			var/current_temperature = current.get_temperature()
+			var/required_temperature = required_temperatures_min[current.id]
+			if(current_temperature < required_temperature) //Current temperature is less than the required temperature,
+				return FALSE
+
+		if(current.id in required_temperatures_max) //The current temperature must be less than this temperature.
+			var/current_temperature = current.get_temperature()
+			var/required_temperature = required_temperatures_max[current.id]
+			if(current_temperature > required_temperature) //Current temperature is greater than the required temperature.
+				return FALSE
+
+	return TRUE

code/modules/reagents/reagent_containers.dm

@@ -93,6 +93,11 @@
 		return
 
 
+/obj/item/weapon/reagent_containers/proc/get_temperature()
+	if(reagents)
+		return reagents.get_temperature()
+	return T0C + 20
+
 /obj/item/weapon/reagent_containers/proc/reagentlist() // For attack logs
 	if(reagents)
 		return reagents.get_reagents()
@@ -143,8 +148,10 @@
 		return 1
 
 	var/contained = reagentlist()
-	target.attack_log += text("\[[time_stamp()]\] <font color='orange'>Has been splashed with [name] by [user.name] ([user.ckey]). Reagents: [contained]</font>")
-	user.attack_log += text("\[[time_stamp()]\] <font color='red'>Used the [name] to splash [target.name] ([target.key]). Reagents: [contained]</font>")
+	var/temperature = reagents.get_temperature()
+	var/temperature_text = "Temperature: ([temperature]K/[temperature]C)"
+	target.attack_log += text("\[[time_stamp()]\] <font color='orange'>Has been splashed with [name] by [user.name] ([user.ckey]). Reagents: [contained] [temperature_text].</font>")
+	user.attack_log += text("\[[time_stamp()]\] <font color='red'>Used the [name] to splash [target.name] ([target.key]). Reagents: [contained] [temperature_text].</font>")
 	msg_admin_attack("[user.name] ([user.ckey]) splashed [target.name] ([target.key]) with [name]. Reagents: [contained] (INTENT: [uppertext(user.a_intent)]) (<A HREF='?_src_=holder;adminplayerobservecoodjump=1;X=[user.x];Y=[user.y];Z=[user.z]'>JMP</a>)",ckey=key_name(user),ckey_target=key_name(target))
 
 	user.visible_message("<span class='danger'>\The [target] has been splashed with something by \the [user]!</span>", "<span class = 'warning'>You splash the solution onto \the [target].</span>")

code/modules/reagents/reagent_containers/borghydro.dm

@@ -83,7 +83,7 @@
 			var/t = min(amount_per_transfer_from_this, reagent_volumes[reagent_ids[mode]])
 			M.reagents.add_reagent(reagent_ids[mode], t)
 			reagent_volumes[reagent_ids[mode]] -= t
-			admin_inject_log(user, M, src, reagent_ids[mode], t)
+			admin_inject_log(user, M, src, reagent_ids[mode], reagents.get_temperature(), t)
 			to_chat(user,"<span class='notice'>[t] units injected. [reagent_volumes[reagent_ids[mode]]] units remaining.</span>")
 	return
 

code/modules/reagents/reagent_containers/glass/bottle.dm

@@ -372,3 +372,25 @@
 		. = ..()
 		reagents.add_reagent("frostoil", 60)
 		update_icon()
+
+/obj/item/weapon/reagent_containers/glass/bottle/pyrosilicate
+	name = "pyrosilicate bottle"
+	desc = "A small bottle. Contains pyrosilicate - used to heat up reagents."
+	icon = 'icons/obj/chemical.dmi'
+	icon_state = "bottle-4"
+
+	Initialize()
+		. = ..()
+		reagents.add_reagent("pyrosilicate", 60)
+		update_icon()
+
+/obj/item/weapon/reagent_containers/glass/bottle/cryosurfactant
+	name = "cryosurfactant bottle"
+	desc = "A small bottle. Contains cryosurfactant - used to cool down reagents."
+	icon = 'icons/obj/chemical.dmi'
+	icon_state = "bottle-4"
+
+	Initialize()
+		. = ..()
+		reagents.add_reagent("cryosurfactant", 60)
+		update_icon()

code/modules/reagents/reagent_containers/hypospray.dm

@@ -49,7 +49,7 @@
 	if(M.reagents)
 		var/contained = reagentlist()
 		var/trans = reagents.trans_to_mob(M, amount_per_transfer_from_this, CHEM_BLOOD)
-		admin_inject_log(user, M, src, contained, trans)
+		admin_inject_log(user, M, src, contained, reagents.get_temperature(), trans)
 		to_chat(user,"<span class='notice'>[trans] units injected. [reagents.total_volume] units remaining in \the [src].</span>")
 
 	update_icon()

code/modules/reagents/reagent_containers/inhaler.dm

@@ -33,7 +33,7 @@
 		if(H.reagents)
 			var/contained = reagentlist()
 			var/trans = reagents.trans_to_mob(H, amount_per_transfer_from_this, CHEM_TOUCH)
-			admin_inject_log(user, H, src, contained, trans)
+			admin_inject_log(user, H, src, contained, reagents.get_temperature(), trans)
 			playsound(src.loc, 'sound/items/stimpack.ogg', 50, 1)
 			user.visible_message("<span class='notice'>[user] accidentally sticks the [src] in [H]'s eyes!</span>","<span class='notice'>You accidentally stick the [src] in [H]'s eyes!</span>")
 			to_chat(user,"<span class='notice'>[trans] units injected. [reagents.total_volume] units remaining in \the [src].</span>")
@@ -65,7 +65,7 @@
 
 	if(H.reagents)
 		var/contained = reagentlist()
-		var/trans = reagents.trans_to_mob(H, amount_per_transfer_from_this, CHEM_BREATHE, bypass_checks = TRUE)
+		var/trans = reagents.trans_to_mob(H, amount_per_transfer_from_this, reagents.get_temperature(), CHEM_BREATHE, bypass_checks = TRUE)
 		admin_inject_log(user, H, src, contained, trans)
 		playsound(src.loc, 'sound/items/stimpack.ogg', 50, 1)
 		to_chat(user,"<span class='notice'>[trans] units injected. [reagents.total_volume] units remaining in \the [src].</span>")

code/modules/reagents/reagent_containers/inhaler_advanced.dm

@@ -141,7 +141,7 @@
 	if(M.reagents)
 		var/contained = stored_cartridge.reagentlist()
 		var/trans = stored_cartridge.reagents.trans_to_mob(M, transfer_amount, CHEM_BREATHE, bypass_checks = TRUE)
-		admin_inject_log(user, M, src, contained, trans)
+		admin_inject_log(user, M, src, contained, reagents.get_temperature(), trans)
 		playsound(M.loc, 'sound/items/stimpack.ogg', 50, 1)
 		if(eject_when_empty)
 			to_chat(user,"<span class='notice'>\The [stored_cartridge] automatically ejects from \the [src].</span>")

code/modules/reagents/reagent_containers/syringes.dm

@@ -194,7 +194,7 @@
 			if(ismob(target))
 				var/contained = reagentlist()
 				trans = reagents.trans_to_mob(target, amount_per_transfer_from_this, CHEM_BLOOD)
-				admin_inject_log(user, target, src, contained, trans)
+				admin_inject_log(user, target, src, contained, reagents.get_temperature(), trans)
 			else
 				trans = reagents.trans_to(target, amount_per_transfer_from_this)
 			user << "<span class='notice'>You inject [trans] units of the solution. The syringe now contains [src.reagents.total_volume] units.</span>"
@@ -269,13 +269,11 @@
 		user.visible_message("<span class='danger'>[user] stabs [target] with [src.name]!</span>")
 		target.take_organ_damage(3)// 7 is the same as crowbar punch
 
-
-
 	var/syringestab_amount_transferred = rand(0, (reagents.total_volume - 5)) //nerfed by popular demand
 	var/contained_reagents = reagents.get_reagents()
 	var/trans = reagents.trans_to_mob(target, syringestab_amount_transferred, CHEM_BLOOD)
 	if(isnull(trans)) trans = 0
-	admin_inject_log(user, target, src, contained_reagents, trans, violent=1)
+	admin_inject_log(user, target, src, contained_reagents, reagents.get_temperature(), trans, violent=1)
 	break_syringe(target, user)
 
 /obj/item/weapon/reagent_containers/syringe/proc/break_syringe(mob/living/carbon/target, mob/living/carbon/user)

code/unit_tests/chemistry_tests.dm

@@ -0,0 +1,29 @@
+/*
+ *
+ *  Specific Heat Chemistry Test
+ *  Checks if a reagent has a specific heat value.
+ *
+ */
+
+datum/unit_test/specific_heat
+	name = "Chemistry Test - Specific Heat"
+
+datum/unit_test/specific_heat/start_test()
+
+	var/error_count = 0
+
+	for(var/type_found in subtypesof(/datum/reagent/))
+		var/datum/reagent/R = new type_found
+		if(istype(R) && R.id && R.name)
+			if(!SSchemistry.has_valid_specific_heat(R))
+				log_unit_test("[ascii_red][R.type] lacks a proper specific heat value![ascii_reset]")
+				error_count++
+		qdel(R)
+
+	if(error_count)
+		fail("[error_count] reagents(s) found without a proper specific heat value. Assign a specific heat value or make a recipe with these reagents as the final product.")
+	else
+		pass("All reagents have a specific heat value.")
+
+	return 1
+

html/changelogs/burgerbb - temperature reagents.yml

@@ -0,0 +1,43 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes: 
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#   balance
+#################################
+
+# Your name.  
+author: BurgerBB
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes: 
+  - experiment: "Added a new system that allows reagents to have their own temperatures. Includes a new unit test for devs."
+  - rscadd: "Added a few new reagents; phoron salts, cryosufacant, pyrosilicate. Ice can be created by cooling water, and water can be created by heating ice."
+  - rscadd: "Added a new chemistry heater that can cool or heat reagents between a range of a temperature. Vending machines and smartfridges have a temperature setting that can either heat or cool reagents; affected by manipulating wires. Ovens and microwaves automatically heat up the reagents to the recipe's requirement."
+  - tweak: "Crewmembers can spawn with either a heated or cooled vacuum flask."
+  - rscadd: "Consuming hot reagents raise your body temperature. Cold reagents lower it. Extremely hot or extremely cold reagents can burn you when splashed."
+  - tweak: "Tricordrazine heals more brute and less burn when hot, and heals more burn and less brute when cold."
+  - bugfix: "Updated clonexadone description to accurately describe what it does. Updated Peridaxon recipe to fix odd recipe logic."

maps/aurora/aurora-4_mainlevel.dmm

@@ -5959,10 +5959,20 @@
 "alF" = (
 /obj/effect/floor_decal/corner/mauve{
 	icon_state = "corner_white";
-	dir = 5
+	dir = 10
 	},
+/obj/structure/table/standard,
+/obj/item/weapon/packageWrap,
+/obj/item/weapon/packageWrap,
+/obj/item/device/destTagger,
+/obj/machinery/light{
+	dir = 2;
+	icon_state = "tube1";
+	pixel_y = 0
+	},
+/obj/item/weapon/hand_labeler,
 /turf/simulated/floor/tiled/white,
-/area/rnd/misc_lab)
+/area/medical/chemistry)
 "alG" = (
 /obj/structure/table/standard,
 /obj/structure/cable/green,
@@ -33680,26 +33690,17 @@
 	icon_state = "corner_white";
 	dir = 10
 	},
-/obj/structure/table/standard,
-/obj/item/weapon/packageWrap,
-/obj/item/weapon/packageWrap,
-/obj/item/device/destTagger,
-/obj/machinery/light{
-	dir = 2;
-	icon_state = "tube1";
-	pixel_y = 0
-	},
+/obj/machinery/chem_heater,
 /turf/simulated/floor/tiled/white,
 /area/medical/chemistry)
 "bgD" = (
 /obj/effect/floor_decal/corner/mauve{
 	icon_state = "corner_white";
-	dir = 10
+	dir = 5
 	},
-/obj/structure/table/standard,
-/obj/item/weapon/hand_labeler,
+/obj/machinery/chem_heater,
 /turf/simulated/floor/tiled/white,
-/area/medical/chemistry)
+/area/rnd/misc_lab)
 "bgE" = (
 /obj/effect/floor_decal/corner/mauve/full{
 	icon_state = "corner_white_full";
@@ -89467,7 +89468,7 @@ bBv
 bCv
 bDo
 aeD
-alF
+bgD
 afW
 akL
 aoP
@@ -95872,7 +95873,7 @@ bbd
 kqR
 bjV
 bfp
-bgC
+alF
 bfJ
 xIT
 mRk
@@ -96129,7 +96130,7 @@ bbe
 bcC
 pyh
 bfp
-bgD
+bgC
 bfJ
 bjw
 bcL