A piston-cylinder device contains 40 kg of water at 150 kPa and 30oC. The cross-sectional area of the piston is 0.1 m2. Heat is now added causing part of the water to evaporate. When the volume reaches 0.2 m3, the piston reaches a spring with a constant spring constant. More heat is added until the volume increases to 0.3 m3 and the pressure increases to 1.35 MPa. Determine.
(a) The spring constant.
(b) The final temperature.
(c) The total heat transfer.