Chemistry

Problem

If the activation energy of a reaction is

80.9 \text{ kJ mol}^{-1}

, the fraction of molecules at

700 \text{ K}

, having enough energy to react to form products is

e^{-x}

. The value of

x

is _______. (Rounded off to the nearest integer) [Use

R = 8.31 \text{ J K}^{-1} \text{ mol}^{-1}

]