A cylinder covered by a weighted frictionless piston of 500 kg and an area of 100 cm2 contains air at 1 MPa and 300°C. The piston is held in position by a stop. The environment is air at 100 kPa and...

A cylinder covered by a weighted frictionless piston of 500 kg and an area of 100 cm2 contains air at 1 MPa and 300°C. The piston is held in position by a stop. The environment is air at 100 kPa and 30°C. The stop is removed and the piston rises a distance of 20 cm till it reaches the upper stop. At this point the air pressure is 700 kPa (Figure P5.43). a. Is this process quasistatic? b. Find the work of air. c. Find the mass and final volume of air.