# Arrhenius equation

play*noun*Ar·rhe·ni·us equation \ə-ˈrē-nē-əs-, -ˈrā-\

*less commonly*## Arrhenius relation

##
Definition of *Arrhenius equation*

*chemistry*

: an equation describing the mathematical relationship between temperature and the rate of a chemical reaction ◆The Arrhenius equation is sometimes expressed as k = Ae

^{-E/RT}where*k*is the rate of chemical reaction,*A*is a constant depending on the chemicals involved,*E*is the activation energy,*R*is the universal gas constant, and*T*is the temperature.*What we’re really looking at here is what’s known as the**Arrhenius equation*. Svante August Arrhenius was a Nobel Prize winning Swedish chemist around the turn of the century. He observed that an increase of 18° F will about double the rate of the average chemical reaction. And the same holds true in reverse: the colder the temperature, the less the rate of reaction. — Matt Kramer,*Wine Spectator*, 15 May 1998*Ideas from elementary statistical mechanics allowed determination of the energies displayed in the figure: The activation barriers were obtained using the**Arrhenius relation*, whereas the Boltzmann relation was used to determine the bound-state energy difference. — Harold J. W. Zandvliet et al.,*Physics Today*, July 2001

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##
Origin and Etymology of *arrhenius equation*

after Svante August *Arrhenius* †1927 Swedish chemist

First Known Use: 1902

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