A cylinder having a piston restrained by a linear spring contains 0.5 kg of saturated steam at 120 ° C,. Heat is transferred to water, which causes the piston to rise and during the process, the resistance force of the spring is proportional to the distance it moves. The spring constant is 15 kN / m. The piston cross-sectional area is 0.05 square meters.
a) what is the pressure in the cylinder when the internal temperature reaches 600 º C?
b) Calculate the heat transfer for the process