Question

At body temperature (37°C), the rate constant of an enzyme-catalyzed decomposition is 3.0 × 108 times that of the uncatalyzed reaction. If the frequency factor, A, is the same for both processes, by how much does the enzyme lower the Ea?

Answer 1

I would choose something like 50,000 J/mol for Ea, use the Arrhenius equation, and solve for k(rate). Then multiply k by 3D8 and calculate the new Ea. Compare the two.