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A cylinder contains ethylene, C2H4, at 222.6 lbf/in 2, 8 F. It is now compressed in a reversible isobaric (constant P) process to saturated liquid.
A cylinder containing R-134a at 50 F, 20 lbf/in 2, has an initial volume of 1 ft3. A piston compresses the R-134a in a reversible, isothermal process
A cylinder containing ammonia is fitted with a piston restrained by an external force that is proportional to cylinder volume squared
A cylinder containing 1 kg of ammonia has an externally loaded piston. Initially the ammonia is at 2 MPa, 180°C and is now cooled to saturated vapor
A cutting tool uses a nozzle that generates a high speed jet of liquid water. Assume an exit velocity of 1000 m/s of 20oC liquid water with a jet diameter
A compressor in a commercial refrigerator receives R-22 at -25oC, x = 1. The exit is at 800 kPa, 40oC. Neglect kinetic energies and find the specific work.
A compressor brings R-134a from 150 kPa, -10oC to 1200 kPa, 50oC. It is water cooled with a heat loss estimated as 40 kW and the shaft work input
The refrigerant enters the condenser at 1.2 MPa and 50°C and leaves at the same pressure sub-cooled by 5°C. If the compressor consumes 3.3 kW of power
A constant pressure piston cylinder contains 0.2 kg water as saturated vapor at 400 kPa. It is now cooled so the water occupies half the original volume.
A condenser (heat exchanger) brings 1 kg/s water flow at 10 kPa from 300°C to saturated liquid at 10 kPa. The cooling is done by lake water at 20°C
A condenser (cooler) receives 0.05 kg/s R-22 at 800 kPa, 40oC and cools it to 15oC. There is a small pressure drop so the exit state is saturated liquid
A computer in a closed room of volume 5000 ft3 dissipates energy at a rate of 10 hp. The room has 100 lbm of wood, 50 lbm of steel and air
A container equipped with a resistance heater and a mixer is initially filled with 3.6 kg of saturated water vapor at 120°C
A constant-volume tank contains a mixture of 1 kmol H2 and 1 kmol O2 at 25°C and 1 atm. The contents are ignited. Determine the final temperature
A constant-volume tank contains a mixture of 120 g of methane (CH4) gas and 600 g of O2 at 25°C and 200 kPa. The contents of the tank are now ignited
A constant-volume tank contains 5 kg of air at 100 kPa and 327°C. The air is cooled to the surroundings temperature of 27°C
A constant pressure piston/cylinder has 2 lbm water at 1100 F and 2.26 ft3. It is now cooled to occupy 1/10 of the original volume
Find the change in availability of the control mass for each of the three cases.
A container with liquid nitrogen at 100 K has a cross sectional area of 0.5 m2. Due to heat transfer, some of the liquid evaporates and in one hour the liquid
A container has a double wall where the wall cavity is filled with carbon dioxide at room temperature and pressure.
A chiller cools liquid water for air-conditioning purposes. Assume 2.5 kg/s water at 20oC, 100 kPa is cooled to 5oC in a chiller
A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -30°C by rejecting its waste heat to cooling
A closed rigid container is charged with propane, C3 H6, and 150% theoretical air at 100 kPa, 298 K. The mixture is ignited and burns with complete combustion.
A closed feedwater heater in a regenerative steam power cycle heats 40 lbm/s of water from 200 F, 2000 lbf/in.2 to 450 F, 2000 lbf/in 2, the extraction steam
A close system consisting of 0.2 lbmol of air undergoes a polytrophic process from P1=20 lbf/in.2, ?1 = 11.50 ft3/lb to a final state where P2= 80 lbf/in2