Air at 1 atm. and 20 C occupies an initial volume of 1000 cm in a...
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Air at 1 atm. and 20 °C occupies an initial volume of 1000 cm³ in a cylinder. The air is confined by a piston which has a constant restraining force so the gas pressure always remains constant. Heat is added to the air until its temperature reaches 260 °C. Calculate the heat added, the work the gas does on the piston, and the change in internal energy of the gas. Molecular weight of air = 28.97Jg/kg K 0.5 m3 tank contains air at 7 MPa, and 250 0C and is perfectly insulated from the surroundings. a valve on the tank is opened and the air discharged until the pressure drops to 400 kPa. Calculate the mass of air discharged from the tank. 5.5 kg of air at 900 kN/ m² absolute pressure and temperature 457° C expands isothermally to 4 times its initial volume. Determine (a) initial volume, (b) final volume, and (c) change in entropy. Take for air the gas constant R=0.287 kJ/ kg K. A rigid cubical enclosure with 50 cm on each side contains a wet mixture of water vapor at 90°C and dryness fraction of 20% . Heat is added until the pressure is raised to 500 kPa. Determine the final state and the quantity of heat added. Air at 1 atm. and 20 °C occupies an initial volume of 1000 cm³ in a cylinder. The air is confined by a piston which has a constant restraining force so the gas pressure always remains constant. Heat is added to the air until its temperature reaches 260 °C. Calculate the heat added, the work the gas does on the piston, and the change in internal energy of the gas. Molecular weight of air = 28.97Jg/kg K 0.5 m3 tank contains air at 7 MPa, and 250 0C and is perfectly insulated from the surroundings. a valve on the tank is opened and the air discharged until the pressure drops to 400 kPa. Calculate the mass of air discharged from the tank. 5.5 kg of air at 900 kN/ m² absolute pressure and temperature 457° C expands isothermally to 4 times its initial volume. Determine (a) initial volume, (b) final volume, and (c) change in entropy. Take for air the gas constant R=0.287 kJ/ kg K. A rigid cubical enclosure with 50 cm on each side contains a wet mixture of water vapor at 90°C and dryness fraction of 20% . Heat is added until the pressure is raised to 500 kPa. Determine the final state and the quantity of heat added.
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Answer Note I have given answers in the order part c part b and part a let P1 1 atm 10... View the full answer
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