Two kilograms of water are contained in a piston/cylinder arrangement. The massless piston is loaded with a linear spring and an external pressure of 100 kPa. The initital force from the spring is zero and the volume is 0.2 m^3. Heat is added until the piston hits the upper stops, where the volume is 0.8 m^3 and the temperature is 600 degrees C. Additional heat is added until the pressure reaches 1.2 MPa. How much work is done? What is the final temperature at 1.2 MPa?