Term: Arrhenius equation
https://doi.org/10.1351/goldbook.A00446

Definition:
An equation that represents the dependence of the rate constant k of a reaction on the absolute temperature T: \[k = A\ \text{e}^{\frac{-E_{\text{a}}}{R\ T}}\] In its original form the pre-exponential factor A and the activation energy Ea are considered to be temperature-independent.

Related Terms:
1) modified arrhenius equation (http://doi.org/10.1351/goldbook.M03963).
2) rate constant (http://doi.org/10.1351/goldbook.R05138).
3) pre-exponential factor (http://doi.org/10.1351/goldbook.P04811).
4) activation energy (http://doi.org/10.1351/goldbook.A00102).

Source: PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2175 (https://doi.org/10.1351/pac199062112167)

Citation: 'Arrhenius equation' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.A00446

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