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A Piston-cylunde device instially contans steamat steam loses heat to the surround ng and the piston moves dowh httie a set oF stops at twhch point the cylnde Contains saturated liq ud wate. The cooling continues un Puse data Frem steam De la) inital tesperature b) the enthalpy Change per unt mass of the saa stcam hl the cyhndes contains water at 115 by the time the piston furst hits the and (C) the final pressure an
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iven gottial pressure P3 s mpa supe ช heated te mperature ) Final temperature ,T : se we take the Steam in the cylindex to be nthe System This isa closed System Since no mass crosses the Sysem bounday fFstom the saturared wahe psiessure table of steam at F, = 3.5 MPa :s, sat 3 5 MMPa 2256 Enthaley, h,28 21 able Then, tme iHal tempesature A-63 Compressed Wouid could be water gnittal Temperaure, Ti = Tsat @ 3.s MPa十 242 56S 丁1 247-560C Answer)For better understanding the problem solved here, needs to see the thermodynamic steam table mentioned in the solution. ( Table A-4 , Table A-5, and Table A-6) . THANK YOU.

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