What is the activation energy of a reaction?

A. The energy the molecules must have in order to react
B. The kinetic energy of the colliding molecules
C. The speed at which the molecules must be moving in order to react
D. The energy that is given off when a reaction happens



Answer :

Final answer:

Activation energy is the minimum energy needed for a reaction to happen and influences the rate of reaction.


Explanation:

Activation energy (Ea) is the minimum energy required for a reaction to occur. It represents the energy threshold that reactant molecules must surpass to form products during a collision. If the activation energy is high, fewer collisions will lead to a reaction, resulting in a slower reaction rate.


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