Two separate reactor systems were used to carry out an elementary gas phase reaction of A decomposing to B and C where all the stoichiometric coefficients are 1 , and where both reactor systems yielded the same conversion of 75% In the first system, a 10-L volume of mixed flow reactor was fed with equimolar concentrations of A and inert I at a rate of 5 liters per second. The temperature in the reactor is 47 degrees Celsius. In the second system, 100%A is fed to a 10L tubular reactor at the same volumetric flow rate as the first but occurring at a temperature of 27 degrees Celsius. Determine the activation energy of the reaction, in kJ/mol