AP Chemistryeasymcq1 pt
On a reaction energy profile, what does the difference between the reactants' energy and the transition state's energy represent?
A.Activation energy
B.Enthalpy change
C.Free energy of reaction
D.Bond energy
Explanation
Core Concept
The barrier from reactants up to the transition state is Ea. Its height controls the rate through the fraction of collisions with enough energy.
Correct Answer
AActivation energy
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