What is an exothermic chemical reaction?

An exothermic reaction is a chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation: reactants → products + energy.

Which is an example of an endothermic reaction?

These examples could be written as chemical reactions, but are more generally considered to be endothermic or heat-absorbing processes: melting ice cubes. melting solid salts. converting frost to water vapor (melting, boiling, and evaporation, in general, are endothermic processes)

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