list two ways that energy is involved in chemical reactions

Question

I really. Need help this question  please help 

I have Beem looking for hours to try and answer this question but It's no use so I'm asking u guys 

Answer 1

exothermic and endothermic are two types of chemical reactions that involve liberation or absorption of energy. Try checking these on Google

 

Regards

 

Jim

Answer 2

Look for a reaction that needs heat as a part of it and that is heat energy

example, S + heat => S is suphur