4
QuizMultiple Choice

Reaction Pathways — Quiz

Question 4 • 26-27 - C - RUSD Chemistry in the Earth System

Which statement best describes how activation energy influences a reaction?

Answer
A
The greater the activation energy, the lower the reaction rate.
B
The greater the activation energy, the greater the enthalpy of reaction.
C
The lower the activation energy, the more energy is released.
D
The lower the activation energy, the lower the energy of the products.

Explanation

Activation energy is the minimum energy particles need to react. If it is greater, fewer particles have enough energy to overcome the energy barrier at a given temperature, so the reaction rate is lower. Activation energy does not determine the reaction’s enthalpy change or the products’ energy.

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