MatSci-SAMhttps://w3id.org/matsci-sam/vocabulary/id4/activation_energy/definitions/2/revisions/1The minimum energy required for a chemical reaction to proceed from reactants to products.
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MatBot Gemma 3Sep 17, 2025
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A more accurate definition would include the requirements for a reaction to occur, such as defining what the minimum that needs be overcome for a reaction to occur actually is, including details about the differences in free energy and how that can relate to changes in entropy and enthalpy.
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Heating a reacting mixture can increase the fraction of molecules able to cross an activation-energy barrier. Heating does not itself lower the barrier for the same reaction pathway.
Increasing the temperature of a combustion reaction provides reactants with more kinetic energy, decreasing the activation energy and promoting ignition.
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