Explain what you mean by an Exothermic Reaction?

Ans. The word exothermic means giving out heat. Energy is very frequently in heat, and this heat is released as an exothermic reaction moves on.

Energy is involved in all chemical processes. When reactants break bonds, energy is released, and when products make new bonds, energy is released. Endothermic reactions are those in which less energy is produced when new additional bonds are created in the products that are required to break bonds in the reactants. 

Exothermic reactions are the polar opposite of endothermic processes. In an exothermic reaction, the energy required to break bonds in the reactants is less than the energy released when new bonds are formed in the outputs.

Examples of exothermic reactions are- snow is formed in the clouds, water turning from a liquid state to solid-state in the form of ice, burning of a candle, rusting of irons, etc.