Lil bro consult your notes ...FYI The answer is C. But do you understand why. There's more to it than simply "lowering the activation energy". Chemical reactions usually occur in multiple steps that together represent the "reaction pathway".
A catalyst allows for a different reaction to occur in this reaction pathway. This new reaction has lower activation energy than the steps in the uncatalyzed reaction. Since the activation energy is lower, more molecules can collide with the needed energy to react and the reaction goes faster.
Therefore, a better way to explain the action of a catalyst is, "A catalyst provides an alternate reaction pathway with a lower activation energy, and an increase in reaction rate."
The addition of a catalyst in a chemical reaction
(A) increases the concentration of products at equilibrium.
(B) increases the fraction of reactant molecules with a given kinetic energy.
(C) provides an alternate path with different activation energy.
(D) lowers the enthalpy change in the overall reaction.
1 answer
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