Exothermic chemical reactions are those that release energy. When bonds are broken in the reactants during exothermic reactions, more energy is released when bonds are formed in the products. The reaction mixture's temperature rises as a result of exothermic reactions.
Energy is released when new bonds form in products and is used to break bonds in reactants. Energy is absorbed and released during endothermic and exothermic reactions, respectively. According to the principle of energy conservation, matter cannot be created or destroyed.
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