Exothermic reactions are chemical processes that release energy, usually in the form of heat or light, to the surroundings. This release of energy occurs as the total energy of the products is lower than that of the reactants, leading to a negative change in enthalpy (ΔH < 0). These reactions play a crucial role in combustion processes, where fuel reacts with an oxidizer to produce heat, light, and various combustion products.
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