activation energy

activation energy
A a


    • US Pronunciation
    • US IPA
    • UK Pronunciation
    • UK IPA
    • /ˈæk təˌveɪt ˈe-nər-jē/
    • /ˈæk.tɪ.veɪt ˈenədʒi/
    • US Pronunciation
    • US IPA
    • /ˈæk təˌveɪt ˈe-nər-jē/

Definitions of activation energy words

  • noun activation energy the least amount of energy required to activate atoms or molecules to a state in which they can undergo a chemical reaction. 1
  • noun activation energy (chemistry, physics) The energy required to initiate a reaction. For example, the flame from the fuse of a firecracker provides a small initial amount of energy, after which the explosive reaction proceeds by itself, releasing a considerably larger quantity of energy. A small push given to a stable but top-heavy object may cause it to fall over; the potential energy released during the fall was present in the system all along but could not be realized as long as the object was upright and balanced. 0

Information block about the term

Origin of activation energy

First appearance:

before 1920
One of the 12% newest English words
First recorded in 1920-25

Historical Comparancy

Parts of speech for Activation energy


activation energy popularity

A common word. It’s meaning is known to most children of preschool age. About 96% of English native speakers know the meaning and use the word.
Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".

activation energy usage trend in Literature

This diagram is provided by Google Ngram Viewer

Synonyms for activation energy

noun activation energy

See also

Matching words

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