Unformatted text preview: SP9: R-134a vapor initially at 60 psia and 120 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 (ft 3 /lbm), specific internal energy (Btu/lbm) and specific enthalpy (Btu/lbm) at each state. SP10: A 0.8 m 3 rigid vessel initially contains a saturated liquid-vapor mixture of water at 90 C. The water is heated until it reaches its critical point. (a) Indicate the process on a P-v diagram. (b) What is the mass (kg) of liquid water at the initial state? (c) Determine the volume (m 3 ) occupied by vapor at the initial state....
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This note was uploaded on 02/22/2012 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue.
- Spring '08