The number of molecules with energy greater than the threshold energy for a reaction increases five

Question

The number of molecules with energy greater than the threshold energy for a reaction increases five fold by a rise of temperature from $27^{\circ} \mathrm{C}$ to $42^{\circ} \mathrm{C}$. Its energy of activation in J/mol is _______.\ (Take $\ln 5=1.6094 ; R=8.314 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$ )\

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