Compute heat transfer in process-change of entropy of air
A mass of 1 kg of air contained in a cylinder at 1.5 MPa, 1000 K, expands in a reversible isothermal process to a volume 10 times larger. Calculate the heat transfer during the process and the change of entropy of the air.
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A mass of 1 kg of air contained in a cylinder at 1.5 MPa, 1000 K, expands in a reversible isothermal process to a volume 10 times larger.
To make ice, a freezer that is a reverse Carnot engine extracts 38 kJ as heat at -10°C during each cycle, with coefficient of performance 6.0. The room temperature is 33.9°C. How much:work per cycle is required to run the freezer?
An air conditioner operating between 93°F and 67°F is rated at 4000 Btu/h cooling capacity. Its coefficient of performance is 27% of that of a Carnot refrigerator operating between the same two temperatures. What horsepower is required of
A piston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kPa. What is the initial temperature of the water?
During the cycle, what are (a) the net energy entering the system (the gas) as heat and (b) the net work done by the gas? (c) What is the efficiency of the cycle?
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