Problem No: 2 An initially empty piston-cylinder assembly, which is well-insulated, is connected to a CO2 line by a valve. The valve is opened to let CO2 in the piston cylinder assembly, where the external pressure is 1 bar. The valve is closed when the volume of the piston cylinder Pext= 1 bar assembly reaches 0.1 m. a) Establish a mass balance for the piston-cylinder assembly CO2, P = 3 bar, T= 283 K b) Starting from the general form of the energy balance, establish the final form of the unsteady-state energy balance by indicating your assumptions c) What would be the temperature inside the piston cylinder assembly? d) What is the number of moles CO2 entered the piston-cylinder assembly? (You can assume ideal gas behavior for CO2, Cpco2= 37 J/mol/K)