Chapter 6, Problem 6.16P

2) As shown, a piston-cylinder assembly contains 5 g of air holding the piston against the stops. The air, initially at 3 bar, 600 K, is slowly cooled until the piston just begins to move downward in the cylinder. The air behaves as an ideal gas, g = 9.81 m/s², and friction is negligible. Sketch the process of the air on a p-V diagram labeled with the temperature and pressure at the end states. Also determine the heat transfer, in kJ, between the air and its surroundings. Patm =1 bar Stops Piston m= 50 kg A = 9.75 × 10-3 m² 5 g of Air T = 600 K P = 3 bar

A cylinder-piston assembly initially contains water at 3 MPa and 300°C. The water is cooled at constant volume to 200 °C, and then compressed isothermally to a final pressure of 2.5 MPa. Sketch the process on a T-v diagram and find the specific volume at the 3 states. [Ans. 0.081l m kg. 0.0811, 1.155x10 m kg]

1. An ideal gas undergoes a process for which the volume remains constant. At the start of the process, p = 15.625 psia, T¡ = 540 R, at the end p2 = 17.425 psia, T2 = 630 R. What is the work done (in Btu/ib) on the system? Your answer Submit