The Main Difference Between a Catalyzed and an Uncatalyzed Reaction

Question

The main difference between a catalyzed and an uncatalyzed reaction is that
A) the activation energy of the catalyzed reaction is lower.
B) the catalyzed reaction has a more favorable free energy change.
C) the catalyzed reaction has a more favorable enthalpy change.
D) the catalyzed reaction has a more favorable entropy change.

Accepted Answer

A catalyst lowers the activation energy required for a reaction to occur. This means that the reaction can occur more easily, and therefore more quickly, with the same amount of energy input. This results in a faster rate of reaction and allows the reaction to proceed under milder conditions than an uncatalyzed reaction. The free energy change, enthalpy change, and entropy change of the reaction are not directly affected by the presence of a catalyst, although they may indirectly be affected by changes in reaction rate and conditions.