releases heat and is endothermic. releases heat and is exothermic. absorbs heat and is endothermic. absorbs heat and is exothermic.
I gave my students this multiple choice question: When coal burns, the reaction

Only one answer is correct among these 4 choices:
- releases heat and is endothermic.
- releases heat and is exothermic.
- absorbs heat and is endothermic.
- absorbs heat and is exothermic.

Could you tell me which one is correct?

releases heat and is exothermic.