Why is there absorption of energy in certain chemical reactions and re

1.	Why is there absorption of energy in certain chemical reactions and release of energy in other reactions?
Answer» 1. If bond dissociation energy of reactants is more than bond energy of products, then energy is absorbed in the chemical reaction. 2. If bond dissociation energy of reactants is less than bond energy of products, then energy is released in the chemical reaction.

Why is there absorption of energy in certain chemical reactions and release of energy in other reactions?

Answer»

1. If bond dissociation energy of reactants is more than bond energy of products, then energy is absorbed in the chemical reaction.

2. If bond dissociation energy of reactants is less than bond energy of products, then energy is released in the chemical reaction.