activation energy (Arrhenius activation energy)

https://doi.org/10.1351/goldbook.A00102
An empirical parameter characterizing the exponential temperature dependence of the rate coefficient, k, Ea=RT2d(lnk)dT, where R is the gas constant and T the thermodynamic temperature. The term is also used for threshold energies in electronic potential surfaces, in which case the term requires careful definition.
Source:
Green Book, 2nd ed., p. 55 [Terms] [Book]
See also:
PAC, 1993, 65, 2291. (Nomenclature of kinetic methods of analysis (IUPAC Recommendations 1993)) on page 2294 [Terms] [Paper]
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1112 [Terms] [Paper]
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 151 [Terms] [Paper]
Citation: 'activation energy' 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.A00102 RIS BibTex EndNote
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