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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
A closed, insulated container is charged with a stoichiometric ratio of oxygen and hydrogen at 77 F and 20 lbf/in 2
A closed system consists of 0.5 kmol of ammonia occupying a volume of 6 m3. Determine
A closed system consisting of 5kg of a gas undergoes a process during which the relationship between pressure and specific volume is pv1.3 = constant.
A closed steel bottle contains ammonia at -20°C, x = 20% and the volume is 0.05 m3. It has a safety valve that opens at a pressure of 1.4 MPa
A combination air cooler and dehumidification unit receives outside ambient air at 35?C, 100 kPa, 90% relative humidity.
A coal-burning steam power plant produces a net power of 300 MW with an overall thermal efficiency of 32 percent.
A coal gasifier produces a mixture of 1 CO and 2H2 that is then fed to a catalytic converter to produce methane
A co-generating steam power plant operates with a boiler output of 25 kg/s steam at 7 MPa, 500?C. The condenser operates at 7.5 kPa and the process
A co-flowing heat exchanger has one line with 2 kg/s saturated water vapor at 100 kPa entering. The other line is 1 kg/s air at 200 kPa, 1200 K
A car uses an average power of 25 hp for a one hour round trip. With a thermal efficiency of 35% how much fuel energy was used? What happened to all the energy
What is the temperature inside the balloon when pressure is maximum?
A Carnot heat engine receives energy from a reservoir at Tres through a heat exchanger where the heat transferred is proportional to the temperature difference
A Carnot heat engine operates between a source at 1000 K and a sink at 300 K. If the heat engine is supplied with heat at a rate of 800 kJ/min
A Carnot heat engine is operating between a source at TH and a sink at TL. If it is desired to double the thermal efficiency of this engine
A Carnot cycle operates between the temperature limits of 300 and 2000 K, and produces 600 kW of net power. The rate of entropy change of the working fluid
A car with mass 1275 kg drives at 60 km/h when the brakes are applied quickly to decrease its speed to 20 km/h.