A cylinder/piston setup contains 1.083 kg of saturated liquid refrigerant R-410a at 20 °C. The piston now slowly expands, maintaining constant temperature to a final pressure of 400 kPa in a reversible process. Calculate the work and heat transfer required to accomplish this process. The initial specific entropy and internal energy are 0.3357 kJ/kg K and 87.94 kJ/kg, and the final specific entropy and internal energy are 1.2108 kJ/kg K and 276.44 kJ/kg, respectively.