A reaction has a rate constant of $\frac{0\mathrm{.}0117}{s}$ at $400\mathrm{.}0K$ and $\frac{0\mathrm{.}689}{s}$ at $450\mathrm{.}0K.$

MISSED THIS? Read Section $15\mathrm{.}5$; Watch IWE $15\mathrm{.}8$

a$.$ Determine the activation barrier for the reaction.

b$.$ What is the value of the rate constant at $425K?$