Figure P9.57 shows a part of an actuator consisting of two cylindrical chambers. The smaller insulated chamber has a diameter of 50 cm, is fi lled with air at 1 MPa and 200°C, and is connected on one...

Figure P9.57 shows a part of an actuator consisting of two cylindrical chambers. The smaller insulated chamber has a diameter of 50 cm, is fi lled with air at 1 MPa and 200°C, and is connected on one end through a valve to a supply line that carries air at 2 MPa and 300°C. The other end is covered by a piston, which is attached through a spring to a piston in the larger chamber with a diameter of 100 cm, which contains argon at 200°C and is in good contact with a reservoir at 200°C. The spring constant is 40 N/cm. Initially, the valve is closed and the whole

assembly is in equilibrium. Now the valve is opened and air fl ows into the smaller chamber till the pressure in the chamber reaches that of the line. Find a. The final temperature in the smaller chamber. b. The heat interaction of the larger chamber. c. The change in the spring length. d. The mass of air that entered the smaller chamber. e. The change in entropy of everything involved in the process.