Eyring equation

The Eyring equation (occasionally also known as Eyring–Polanyi equation) is an equation used in chemical kinetics to describe the variance of the rate of a chemical reaction with temperature. It was developed almost simultaneously in 1935 by Henry Eyring, Meredith Gwynne Evans and Michael Polanyi. This equation follows from the transition state theory (a.k.a. activated-complex theory) and is trivially equivalent to the empirical Arrhenius equation which are both readily derived from statistical thermodynamics in the kinetic theory of gases.

The general form of the Eyring–Polanyi equation somewhat resembles the Arrhenius equation:

${\displaystyle \ k={\frac {k_{\mathrm {B} }T}{h}}\mathrm {e} ^{-{\frac {\Delta G^{\ddagger }}{RT}}}}$

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