The activation energy for the gas phase decomposition of t$-$butyl propionate is $164kJ.$

$C_2{H}_5\frac{C}{O}OC(C{H}_3{)}_3(C{H}_3{)}_{2}C=C{H}_2+C_2{H}_5\frac{C}{O}OH$

The rate constant at $536K$ is $6\mathrm{.}88{10}^{-4}{s}^{-1}.$ The rate constant will be

$s^{-1}at571K.$