Arrhenius equation gives the change in rate constant (and hence rate of reaction) with temperature. — Chemical Kinetics Chemistry Question

💡 Solution & Explanation

From the Arrhenius equation, K = A * e^(-Ea/RT). If Ea = RT, then K = A * e^(-1) = A / e = A / 2.718 ≈ 0.368 A. This means the rate constant becomes approximately 37% of the pre-exponential factor A. Therefore, correct answer is B.