A piston/cylinder contains ethane gas, initially at 500 kPa, 100 L, and at ambient temperature, 0C. The piston is now moved, compressing the ethane until it is at 20C, with a quality of 50%. The work required is 25% more than would have been required for a reversible polytropic process between the same initial and final states. Calculate the heat transfer and the net entropy change for the process.