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.
See also: modified Arrhenius equation
Sources:
PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2175 (https://doi.org/10.1351/pac199062112167)
PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1086 (https://doi.org/10.1351/pac199466051077)
PAC, 1996, 68, 149. 'A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)' on page 153 (https://doi.org/10.1351/pac199668010149)