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In the Arrhenius model of reaction rates, activation energy is the minimum amount of energy that must be available to reactants for a chemical reaction to occur. The activation energy (Ea) of a reaction is measured in kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol). Activation energy can be thought of as the magnitude of the potential barrier (sometimes called the energy barrier) separating minima of the potential energy surface pertaining to the initial and final thermodynamic state. For a chemical reaction to proceed at a reasonable rate, the temperature of the system should be high enough such that there exists an appreciable number of molecules with translational energy equal to or greater than the activation energy. The term "activation energy" was introduced in 1889 by the Swedish scientist Svante Arrhenius.
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References
- ↑ Koester, Vera; Goedecke, Catharina (2023). "Physical Chemistry Pioneer: Svante Arrhenius (1859 – 1927)". ChemViews. doi:10.1002/chemv.202300014.
- ↑ "Arrhenius-plaketten". The Swedish Chemical Society. Retrieved 31 October 2024.
- ↑ "The Swedish Chemical Society - Arrhenius Plaque | EFG - European Funding Guide". www.european-funding-guide.eu. Retrieved 2024-11-06.
- ↑ "The M.S. Tswett Chromatography Medal 1979". Chromatographia. 12 (10): 679. October 1979. doi:10.1007/BF02302945.
- ↑ Ettre, L.S.; Zlatkis, A. (1 January 1979). "Per Flodin". Journal of Chromatography Library. 17: 67–74. doi:10.1016/S0301-4770(08)60636-3. ISBN 978-0-444-41754-1.
- ↑ Dėdinaitė, Andra; Claesson, Per M. (2017). "Synergies in lubrication". Physical Chemistry Chemical Physics. 19 (35): 23677–23689. doi: 10.1039/C7CP03517A . PMID 28681896.
- ↑ "Professor Lisbeth Olsson receives the Arrhenius plaque". 2 January 2019. Retrieved 31 October 2024.
- ↑ "Arrhenius-plaketten till kemiprofessor Berit Olofsson".
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