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A vapor initially at 50 psia and 100 F (State 1) is contained within a piston- cylinder device. The refrigerant is cooled at constant volume until its temperature reaches 25 F (State 2) and is then compressed isothermally to a pressure of 45 psia (State 3).
(a) Locate the state points on appropriately labeled P-v and T-v diagrams.
(b) Determine the specific volume (in ft3/lbm), internal energy (in Btu/lbm) and enthalpy (in Btu/lbm) at each state point.
Determine the mass flow rate of the air passing through this engine and the rates of heat addition and rejection when this engine produces 1000 hp. Assume constant specific heats at room temperature.
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neil a. armstrong was the first person to walk on the moon. the distance between the earth and the moon is 3.85 108 m.
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determine the work and heat transfer, each in kJ. sketch the process on p-v and T-s coordinates. Associate the work and heat transfer with areas on these diagrams.
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