Zadanie 20

The rate constant, k, of a reaction was measured at several temperatures. A graph of ln k against 1/T (with T in kelvin) is a straight line with a gradient of −5.2 × 10³ K.

$\ln k = -\dfrac{E_\mathrm{a}}{RT} + \ln A$

R = 8.31 J K⁻¹ mol⁻¹

What is the activation energy of the reaction, in kJ mol⁻¹?

A. 0.63

B. 5.2

C. 43

D. 43 000