Values of the specific internal energy of a fuel gas at two conditions are listed below. i) What reference state was used to generate the listed specific internal energies? ii) Calculate U^(kJ/mol) for a process in which a fuel gas vapor at 320K is condensed at constant pressure. Then, calculate H^(kJ/mol) for the same process. Finally, calculate H^(kJ) for 25mol of the fuel gas that undergo the process