Exothermic reaction

An exothermic reaction is a chemical process that releases energy, usually in the form of heat, into its surroundings. This occurs when the total energy of the products is lower than that of the reactants, meaning energy is freed as bonds form. Such reactions often produce warmth or even light, like when burning fuels or mixing certain chemicals. Because they release heat, exothermic reactions are commonly used in heating applications, hand warmers, and even in explosions. They play a vital role in natural and industrial processes, highlighting the transfer of energy during chemical changes.