A piston–cylinder assembly contains 3 kg of steam at a pressure of 100 bar and a temperature of 400ºC. It undergoes a process whereby it expands against a constant pressure of 20 bar, until the forces balance. During the process, the piston generates 748,740 [J] of work. Water is not an ideal gas under these conditions. Determine the fi nal temperature in K and the heat transferred (in [J]) during the process.