Definition of activation energy in English:

activation energy

Syllabification: ac·ti·va·tion en·er·gy


  • The minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.
    More example sentences
    • The energy that is required to activate molecules for a chemical reaction is the activation energy of the reaction.
    • In addition, to cause a reaction the colliding reactant molecules must surpass a minimum energy termed the activation energy and, in many cases, the reactant molecules must have a certain spatial orientation with respect to each other.
    • Chemical reactions require a minimum or threshold energy, called the activation energy.

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