Calculate Suniverse for the following isothermal process and show that the result is consistent with the second law of thermodynamics. Assume Tsur = Tsys and Pex = 1 bar. A piston is loaded with an ideal gas and the pressure is maintained with a large mass. The mass is then suddenly removed. The pressure before expansion is 2 bar and the molar volume of the gas is 0.04 m3 /mol. At the end of the expansion, the pressure is 1 bar and the molar volume is 0.08 m3 /mol.