| NOUN | phenomenon | energy of activation, activation energy | the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur |
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| Meaning | The energy that an atomic system must acquire before a process (such as an emission or reaction) can occur. | |
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| Example | "catalysts are said to reduce the energy of activation during the transition phase of a reaction" | |
| Synonym | activation energy | |
| Broader | energy, free energy | (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work |
| Spanish | energía de activación | |
| Catalan | energia d'activació | |
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