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← ScienceWhich 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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