Question

Required information A piston-cylinder device initially contains 0.6 m3 of saturated water vapor at 250 kPa. At this state, the piston is resting on a set of stops, and the mass of the piston is such that a pressure of 300 kPa is required to move it. Heat is now slowly transferred to the steam until the volume becomes 1.3 m3. Use the data from the steam tables. Determine the final temperature. (You must provide an answer before moving on to the next part.) The final temperature is 1 °C.

Answer 1

cylinchev Givens Piston with water vapour 2) initial volume = v Via 0.6m3 pressure = P1=250kpa as saturated rapon processes, 2-3=p2c processes ras P2 = 300kpaaps; Vz=1-3m3 1-2 z Vzc 3 zg at state specific volume 2,=0.7187 m3/kg 2) mass ass of water vapour ma V 29 6.6 07182 ma 0.83u8urg -> speafic enthalphys ha 271685 665(kg

>>cet state Vec 2) V=c 22 Viz Uz en los correspoing supertreated state temperactures Tz 32000 3.4736 specific enthalp hy h2= 2865.982 kg/kg 2) zg at state 3 => pac 300kpa >> V3: 1:55718 MIKS 0.83484 1932 Ve ६. Heated, temperacle corresponding super from steam tables is T3= o. 739.52°c 27 final Temperacture (132739.52°c