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activation energy
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Energy for exothermic reaction, endothermic reaction, and a reaction with a catalyst A graph showing a potential energy curve for a chemical reaction, with the y-axis labeled potential energy and the x-axis labeled progress of reaction. The curve rises from the initial state (reactants) to a peak labeled transition state (activated complex), indicating activation energy, then drops to the final state (products).

activation energy: References & Edit History

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Article History

Type Description Contributor Date
Article revised and updated. Nov 14, 2025
Corrected display issue. Apr 16, 2021
Add new Web site: Khan Academy - Activation energy. Apr 18, 2020
Removed "in terms of." Aug 24, 2015
Add new Web site: Purdue University - Activation Energy. Sep 26, 2011
Add new Web site: Purdue University - Activation Energy. Sep 08, 2011
Add new Web site: Fact Monster - Science - Activation Energy. Sep 08, 2011
Add new Web site: Rader's Chem4Kids.com - Catalysts and Inhibitors. Sep 08, 2011
Article added to new online database. Jul 20, 1998
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