Exothermic

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Exothermic

Exothermic (/ɛksoʊˈθɜːrmɪk/; from the Greek words exo meaning "outside" and thermos meaning "heat") refers to a process or reaction that releases energy in the form of heat. It is the opposite of an endothermic process, which absorbs heat from the surroundings.

Etymology

The term "exothermic" was first used in the mid-19th century and is derived from the Greek exo (outside) and thermos (heat). It is used to describe chemical reactions where heat is a product.

Related Terms

  • Chemical reaction: A process that leads to the transformation of one set of chemical substances to another.
  • Endothermic: A term used to describe a process or reaction that absorbs energy in the form of heat.
  • Thermodynamics: The branch of physical science that deals with the relations between heat and other forms of energy.
  • Activation energy: The minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction.
  • Enthalpy: A measure of the total energy of a thermodynamic system.

Pronunciation

Exothermic is pronounced as /ɛksoʊˈθɜːrmɪk/.

See Also

External links

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