Chemical Kinetics

What is the activation energy \((\mathrm{kJ} / \mathrm{mol})\) for a reaction if its rate constant doubles when the temperature is raised from \(300 \mathrm{~K}\) to \(400 \mathrm{~K}\) of these \((R=8.314 \mathrm{~Jmol}^{-1} \mathrm{~K}^{-1})\)