Thermodynamics

A piston-cylinder assembly initially contains 0.1m3 of ethylene gas at 393K and 35 bar pressure. The pressure of the gas in the piston-cylinder assembly is reversible and isothermally brought to 205 bar (In all cases below, the conditions for this compression process will be used). a) Assuming that ethylene obeys the ideal gas equation, calculate the heat transferred (J/mol) and the work done (J/mol) between the system and its surroundings. b) Assuming that ethylene obeys the Peng-Robinson equation of state, calculate the internal energy change (J/mol) during the process. A piston-cylinder assembly initially contains 0.1m3 of ethylene gas at 393K and 35 bar pressure. The pressure of the gas in the piston-cylinder assembly is reversible and isothermally brought to 205 bar (In all cases below, the conditions for this compression process will be used). a) Assuming that ethylene obeys the ideal gas equation, calculate the heat transferred (J/mol) and the work done (J/mol) between the system and its surroundings. b) Assuming that ethylene obeys the Peng-Robinson equation of state, calculate the internal energy change (J/mol) during the process