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A room is cooled by circulating chilled water through a heat exchanger located in a room. The air is circulated through the heat exchanger by a 0.25-hp
A room contains air at 70°F and 14.6 psia at a relative humidity of 85 percent. Determine (a) The partial pressure of dry air
A sealed rigid vessel has volume of 35 ft3 and contains 2 lbm of water at 200 F. The vessel is now heated.
A sales person selling refrigerators and deep freezers will guarantee a minimum coefficient of performance of 4.5 year round. How would you evaluate that?
The mass fraction of steam that condenses at the turbine exit. You should solve the problem in a step by step. You should include all the units which are needed
A sheet of rubber is stretched out over a ring of radius 0.25 m. I pour liquid water at 20oC on it so the rubber forms a half sphere (cup).
A sharp-edged orifice is used to measure the flow of air in a pipe. The pipe diameter is 100 mm and the diameter of the orifice is 25 mm
A semi permeable membrane is used for the partial removal of oxygen from air that is blown through a grain elevator storage facility
A rigid tank contains an ideal gas at 300 kPa and 600 K. Now half of the gas is withdrawn from the tank and the gas is found at 100 kPa at the end of the proces
A rigid tank initially contains 1.4-kg saturated liquid water at 200°C. At this state, 25 percent of the volume is occupied by water and the rest by air
A six-cylinder, four-stroke, 4.5-L compression-ignition engine operates on the ideal diesel cycle with a compression ratio of 17.
A simple ideal Rankine cycle operates between the pressure limits of 10 kPa and 3 MPa, with a turbine inlet temperature of 600°C.
A rigid, insulated vessel contains superheated vapor steam at 450 lbf/in 2, 700 F. A valve on the vessel is opened, allowing steam to escape
A rigid vessel initially contains 2 kmol of carbon and 2 kmol of oxygen at 25?C, 200 kPa. Combustion occurs, and the resulting products consist of 1 kmol
A rigid tank with a volume of 2.5 m3 contains 15 kg of saturated liquid-vapor mixture of water at 75°C. Now the water is slowly heated
A rigid tank initially contains 100 L of saturated-liquid R-12 and 100 L of saturated-vapor R-12
A rigid tank containing 0.4 m3 of air at 400 kPa and 30°C is connected by a valve to a piston-cylinder device with zero clearance
A room contains air at 20°C and 98 kPa at a relative humidity of 85 percent. Determine
A room contains 60 kg of air at 100 kPa and 15°C. The room has a 250-W refrigerator (the refrigerator consumes 250 W of electricity when running)
A river flowing steadily at a rate of 240 m3/s is considered for hydroelectric power generation. It is determined that a dam can be built to collect water
A rigid insulated container has two rooms separated by a membrane. Room A contains 1 kg air at 200oC and room B has 1.5 kg air at 20oC, both rooms at 100 kPa
A rigid container, 10 m3 in volume, contains moist air at 45°C, 100 kPa, 40%. The container is now cooled to 5°C
The partition ruptures, and the nitrogen comes to a uniform state at 100°C. Assuming the surroundings are at 25°C find the actual heat transfer
Disregard other possible species and determine the final pressure, the equilibrium composition and the heat transfer for the process.
The partition wall is removed and the water comes to a uniform state, which after a while due to heat transfer has a temperature of 200°C.