53. For the reaction CO + NO2 ---> CO2 + NO The activation energy for the forward reaction is 135 KJ/mol of CO reacted. a) Determine the heat of reaction. DH = Hf products - Hf reactants = (197.9 + 240.5) - (213.6 + 210.6) = 14.2 kJ/mol b) From the data given, and the DHr for the reaction, determine the activation energy for the reverse reaction. Im pretty sure I did part a right, but how do I do part b?