NINE kg of AIR is initially contained in a rigid tank at 1000 kPa and ONE kg of AIR occupies space in a piston-cylinder device. The valve in the Air Tank pipe connecting the tank to the cylinder is accidentally bumped slightly open causing air to slowly leak from the tank to the cylinder. The heavy piston moves freely (without friction) as shown. The process occurs slowly enough that there is sufficient heat transfer to maintain a uniform and constant temperature of 300 K. Neglect changes in kinetic & potential energy of the air. The surrounding atmospheric pressure is 100 kPa. Given: piston weight = 120 kN, area = 0.60 m2.
FIND: The mass and volume of air in the cylinder when equilibrium is finally achieved and the total heat transfer required, QIN (kJ). NOTE: Complete a p-V diagram, fill out a property table and clearly show your analysis.