Consider the Arrhenius Equation; it is used to theoretically estimate the rate constant for a chemical reaction based on: the activation energy Ea and the reaction temperature T (K). R is the ideal gas constant 8.314 JK-1.
k=AeEa/RT
A research chemist performing chemical kinetics experiments has determined that when the temperature is 510K the rate constant k is 3 x 10-7 L/mole sec and when the temperature is 535 K the rate constant k is 1 x 10-6 L/mole sec. Estimate the activation energy Ea.