Consider the following potential energy profile for the A → B reaction. Assuming that the frequency factor for the reaction is 5.5 × 10¹⁰ s^-1, what is the rate constant of this first-order reaction at 310 K?

Question

Quizplus · Accepted Answer

According to the Arrhenius equation, the rate constant k can be calculated as:
$k = A e^\frac{-Ea}{RT}$
where A is the frequency factor, Ea is the activation energy, R is the gas constant, and T is the temperature in Kelvin.

At 310 K, the rate constant can be calculated as:
$k = 5.5 × 10^{11} s^{-1} e^\frac{-165}{8.314×310}$
$k = 5 × 10^5 s^{-1}$

Therefore, the best choice is B as it is closest to the calculated value.

Consider the Following Potential Energy Profile for the a →