Exothermic Reaction

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Exothermic Reaction

 

a chemical reaction in which heat is given off. Examples of exothermic reactions are combustion, neutralization, and most of the reactions involving the formation of chemical compounds from elements. The amount of heat liberated during an exothermic reaction depends on the type of reaction, the mass and nature of the reagents, the phase of the products and reactants, and the specific conditions under which the reaction occurs (for instance, temperature and pressure). The heat of reaction of an exothermic reaction is equal in absolute value but opposite in sign to that of the corresponding endothermic reaction.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.