activation energy
Noun 1. the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur; "catalysts are said to reduce the energy of activation during the transition phase of a reaction" (synonym) energy of activation (hypernym) energy | ||||
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Activation energy definition was found in categories: Science & Technology(2) Encyclopedia(1)
Activation energy Definition from Science & Technology Dictionaries & Glossaries
| General Chemistry Glossary |
activation energy
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(Ea) The minimum energy required to convert reactants into products; the difference between the energies of the activated complex and the reactants.
(Ea) The minimum energy required to convert reactants into products; the difference between the energies of the activated complex and the reactants.
| Materials Science and Engineering Glossary of Terms |
activation energy
the energy required to initiate a reaction, such as diffusion.
the energy required to initiate a reaction, such as diffusion.
Activation energy Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Activation energy
In chemistry, activation energy, also called threshold energy, is a term introduced in 1889 by Svante Arrhenius that is defined as the energy that must be overcome in order for a chemical reaction to occur. Activation energy may otherwise be denoted as the minimum energy necessary for a specific chemical reaction to occur. The activation energy of a reaction is usually denoted by Ea, and given in units of kilojoules per mole.
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