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A reaction in which energy is released to the surroundings is called an exothermic reaction. In this type of reaction the enthalpy, or stored chemical energy, is lower for the products than the reactants.
These are chemical reactions. Exothermic reaction is a chemical reaction where heat is released, thus making the surrounding feel warmer. Endothermic reaction is a chemical reâ¦action where heat is absorbed and thus makes the surroundings feel colder.