(2) A piston-cylinder assembly is initally 0.1m3 of ethylene gas at 393C and 35 bar pressure. The pressure of the gas in the piston-cylinder assembly is reversible and isothermally brought to zosbar (in all coses below, the conditions for this compression process will be used.) a) Assuming that ethylene abeys the ideal gos equation, calculate the heat transferred (J/mol) and the work done (J/mal) between the system and its surroundings. b) Assuming that ethylene obeys the peng Rabinson equation of state, calculate the internal energy change (J/mel) during the process