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Which consequence occurs when a catalyst doubles pre-exponential A constant?

A)Reaction rate constant always doubles
B)Activation energy barrier halves itself
C)Equilibrium constant doubles completely
D)Standard Gibbs free energy halves

💡 Explanation

Increasing the pre-exponential factor (A) in the Arrhenius equation directly increases the reaction rate constant because the activation energy term is unchanged; therefore, reaction rate doubles, rather than changes to activation energy or only affecting the equilibrium constant.

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