3.62) Piston/Cylinder with a liner spring and P-v diagram

A piston/cylinder arrangement is loaded with a linear spring and the outside atmosphere. It contains water at 5 MPa, 400°C, with the volume being 0.1 m³, as shown in Fig. P3.62. If the piston is at the bottom, the spring exerts a force such that Plift = 200 kPa. The system now cools until the pressure reaches 1200 kPa. Find the mass of water and the final state (T2, v2) and plot the P-v diagram for the process.