Image text transcribed for accessibility: A cylinder having a piston restrained by a linear spring contains 0.5 kg of saturated vapor water at 120 degree C, as shown in Fig. . Heat is transferred to the water, causing the piston to rise, and during this process the spring resisting force is proportional to the distance moved. The spring constant is 15 kN/m. The piston cross-sectional area is 0.05 m2. What is the pressure in the cylinder when the temperature inside reaches 600 degree C? Calculate the heat transfer for this process.