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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.
A certain application requires maintaining the refrigerated space at -32°C. Would you recommend a simple refrigeration cycle with refrigerant-134a
If the food compartment of the refrigerator is to be maintained at 3°C, determine the rate of heat removal from the food compartment.
A Carnot refrigerator operates in a room in which the temperature is 25°C. The refrigerator consumes 500 W of power when operating and has a COP of 4.5
A Carnot heat engine receives heat at 750 K and rejects the waste heat to the environment at 300 K. The entire work output of the heat engine is used
A Carnot heat engine receives heat from a reservoir at 900°C at a rate of 800 kJ/min and rejects the waste heat to the ambient air at 27°C.
A certain coal has the following analysis on a mass basis: 82 percent C, 5 percent H2O, 2 percent H2, 1 percent O2, and 10 percent ash.
A certain refrigerant vapor enters an SSSF constant pressure condenser at 150 kPa, 70°C, at a rate of 1.5 kg/s, and it exits as saturated liquid.
A certain industrial process requires a steady 0.5 kg/s supply of compressed air at 500 kPa, at a maximum temperature of 30°C
A boiler delivers steam at 1500 lbf/in.2, 1000 F to a two-stage turbine. After the first stage, 25% of the steam is extracted at 200 lbf/in 2 for a process