Energy Changes and Formations of Chemical Bonds

Breaking and Formation of Chemical Bond

1. During a reaction, energy must be supplied to break bonds in the reactants, and energy is give out when the bonds in the products form.
2. The amount of energy that absorbed or released depends on the strength of the bond.
3. If the amount of energy released during the process of creating bond is higher than the amount of energy that taken in during process of breaking bond, the reaction is an exothermic reaction.
4. If the amount of energy been absorbed to break the bond is higher than the amount of energy been released during the formation of chemical bond, the reaction is an endothermic reaction.