A spring with constant K = 500 kN/m just touches the top of the circular piston of

Question:

A spring with constant K = 500 kN/m just touches the top of the circular piston of Fig. 3.46 (see Fig. 3.14 also). The cylinder contains steam initially at a quality of 40%. Estimate the distance the spring will be compressed when the temperature reaches
a) 300°C,
b) 400°C,
c) 500°C. The stops have been removed.