alleryStart learning →What is meant by the activation energy of a reaction?
AThe energy given out as the products form
BThe average kinetic energy of all molecules
CThe energy stored in the bonds of products
DThe minimum energy needed for it to proceed
Answer & Solution
Correct answer: D. The minimum energy needed for it to proceed
1. Molecules need a certain amount of energy before they can be turned into products.
2. That least amount is the activation energy.
3. It is a barrier to be climbed, not energy released when products appear.
4. The average kinetic energy of the sample is a separate quantity, and a reaction is slow when the activation energy sits well above it.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 12 "Kinetics", section 12.2 Factors Affecting Reaction Rates_
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