Endothermic reaction : A chemical reaction which is accompanied by the absorption of energy is called an endothermic reaction.
- C (s) + 2S (s) + Heat → CS2(l)
Exothermic reaction : A chemical reaction which is accompanied by the release of energy is called exothermic reaction.
- When quick lime (calcium oxide) is placed in water, the water becomes very hot and sometimes starts boiling. It is because of release of heat energy during the reaction.
