Chapter 6, Problem 6.15CU

4. A two-phase, liquid-vapor mixture of H,O, initially a kPa, is contained in a piston – cylinder assembly, as shown in Fig 4. The mass of the piston is 10 kg, and its diameter is 15 cm. The pressure of the surroundings is 100 kPa. As the water is heated, the pressure inside the cylinder remains constant until the piston hits the stops. Heat transfer to the water continues at constant volume until the Water, initially at X= 30%, p= 100 kPa- Piston D= 15 cm m- 10 kg Pen= 100 kPa pressure is 150 kPa. Friction between the piston and the cylinder wall and kinetic and potential energy effects are negligible. Present the process on the P-v diagram. For the overall process of the water, determine the work and heat transfer, each in kJ. 2 cm- -8 cm

Applying the appropriate thermodynamic conditions derive the phase rule for a condensed system.

Plot the process on pv diagram which show the state points relative to the vapor dome. Label the states 1,2,3.. to indicate the sequence of the change in state.