A cylinder/piston contains water at 200 kPa, 200C with a volume of 20 L. The piston is

Question:

A cylinder/piston contains water at 200 kPa, 200C with a volume of 20 L. The piston is moved slowly, compressing the water to a pressure of 800 kPa. The loading on the piston is such that the product PV is a constant. Assuming that the room temperature is 20C, show that this process does not violate the second law.