exothermic

or ex·o·ther·mal

[ ek-soh-thur-mik ]

Phonetic (Standard)IPA

adjective

, Chemistry.

noting or pertaining to a chemical change that is accompanied by a liberation of heat ( endothermic ).

exothermic

/ ˌɛksəʊˈθɜːmɪk /

(of a chemical reaction or compound) occurring or formed with the evolution of heat Compare endothermic exoergic

exothermic

/ ĕk′sō-thûr′mĭk /

First recorded in 1880–85; exo- + thermic

For it was a new kind which contained an exothermic ingredient.

Compounds formed with the evolution of heat are termed exothermic, while those formed with an absorption are termed endothermic.

When carbon unites chemically with oxygen, it is an exothermic reaction that gives off heat as correlated energy.

All chemical compounds are either “endothermic” or “exothermic.”

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