What is activation energy ?
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In chemistry and physics, activation energy is the energy which must be available to a chemical or nuclear system with potential reactants to result in: a chemical reaction, nuclear reaction, or various other physical phenomena.
The activation energy (Ea) of a reaction is measured in joules (J) and or kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol).
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activation energy is the minimum energy required by a particular species to undergo reactions
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