A cylinder/piston containing 2 kg of ammonia at 10C, 90% quality is brought into a 20C room and attached to a line flowing ammonia at 800 kPa, 40C. The total restraining force on the piston is proportional to the cylinder volume squared. The valve is opened and ammonia flows into the cylinder until the mass inside is twice the initial mass and the valve is closed. An electrical current of 15 A is passed through a 2-resistor inside the cylinder for 20 min. It is claimed that the final pressure in the cylinder is 600 kPa. Is this possible?