activation energy

phrase

1. Noun

The energy barrier that must be overcome for a reaction to begin.

The minimum energy required for reacting particles to form products.

“The enzyme reduced the activation energy.”

2. Noun

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"
Vocabulary classified under Physics
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