Answer:
The answer to your question is the letter a. Exothermic.
Explanation:
From the data given, to determine if a chemical reaction is exothermic or endothermic we observe the value of ΔH.
If ΔH is negative, the reaction is exothermic, that means that it releases heat.
If ΔH is positive, the reaction is endothermic and means that it absorbs heat.
In this problem, ΔH is negative so it is exothermic.
