[MIRROR] Pyrosium reactions sets temperature & causes reactions insid…

…e holder [MDB IGNORE] (#25519)

* Pyrosium reactions sets temperature & causes reactions inside holder (#80176)

## About The Pull Request
- Fixes #79933

Now uses `expose_temperature()` to heat the holder by 10 kelvin each
step. Also uses `expose_temperature()` to change temperature to 20
kelvin when pyrosium is first made.

## Changelog
:cl:
fix: Pyrosium oxygen reaction now heats the holder and causes reactions
inside it. Also correctly sets the holder temperature to 20 kelvin &
causes reactions when first made
/:cl:

* Pyrosium reactions sets temperature & causes reactions inside holder

---------

Co-authored-by: SyncIt21 <[email protected]>

code/modules/reagents/chemistry/recipes/pyrotechnics.dm

@@ -503,7 +503,7 @@
 	reaction_tags = REACTION_TAG_EASY | REACTION_TAG_UNIQUE
 
 /datum/chemical_reaction/pyrosium_oxygen/on_reaction(datum/reagents/holder, datum/equilibrium/reaction, created_volume)
-	holder.chem_temp += 10*created_volume
+	holder.expose_temperature(holder.chem_temp + (10 * created_volume), 1)
 
 /datum/chemical_reaction/pyrosium
 	results = list(/datum/reagent/pyrosium = 3)
@@ -516,8 +516,7 @@
 	reaction_tags = REACTION_TAG_EASY | REACTION_TAG_UNIQUE
 
 /datum/chemical_reaction/pyrosium/on_reaction(datum/reagents/holder, datum/equilibrium/reaction, created_volume)
-	holder.chem_temp = 20 // also cools the fuck down
-	return
+	holder.expose_temperature(20, 1) // also cools the fuck down
 
 /datum/chemical_reaction/teslium
 	results = list(/datum/reagent/teslium = 3)