basic

Catalytic Rate Enhancement from Lowered Activation Energy Calculator

k_cat / k_uncat = exp(ΔEa / R·T).

Compute the factor by which a catalyst speeds up a reaction at temperature T, given that the activation energy drops by ΔEa: k_cat / k_uncat = exp(ΔEa / R·T). Same Arrhenius A is assumed for catalyzed and uncatalyzed paths. A 25 kJ/mol drop at room T gives a ~24,000× rate increase.

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Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

kJ/mol
K

Results

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How to use this calculator

  1. Fill in the inputs above using the units you already have.
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  3. Hover any result row for the underlying formula and intermediate values.

Formula

ratio = exp(ΔEa / R·T).

In depth

Compute the factor by which a catalyst speeds up a reaction at temperature T, given that the activation energy drops by ΔEa: k_cat / k_uncat = exp(ΔEa / R·T). Same Arrhenius A is assumed for catalyzed and uncatalyzed paths. A 25 kJ/mol drop at room T gives a ~24,000× rate increase.