Thermodynamics

cen84959_ch03.qxd 4/1/05 12:31 PM Page 1553–24C Can quality be expressed as the ratio of the volumeoccupied by the vapor phase to the total volume? Explain.3–25C In the absence of compressed liquid tables, how isthe specific volume of a compressed liquid at a given P and Tdetermined?3–26 Complete this table for H 2 O:T, °C P, kPa v, m 3 /kg Phase description50 4.16200 Saturated vapor250 400110 6003–27 Reconsider Prob. 3–26. Using EES (or other)software, determine the missing properties ofwater. Repeat the solution for refrigerant-134a, refrigerant-22, and ammonia.3–28E Complete this table for H 2 O:T, °F P, psia u, Btu/lbm Phase description300 78240 Saturated liquid500 120400 4003–29E Reconsider Prob. 3–28E. Using EES (or other)software, determine the missing properties ofwater. Repeat the solution for refrigerant-134a, refrigerant-22, and ammonia.3–30 Complete this table for H 2 O:T, °C P, kPa h, kJ/kg x Phase description200 0.7140 1800950 0.080 500800 3162.23–31 Complete this table for refrigerant-134a:T, °C P, kPa v, m 3 /kg Phase description8 32030 0.015180 Saturated vapor80 6003–32 Complete this table for refrigerant-134a:T, °C P, kPa u, kJ/kg Phase description20 9512400 3008 600Saturated liquidChapter 3 | 1553–33E Complete this table for refrigerant-134a:T, °F P, psia h, Btu/lbm x Phase description80 7815 0.610 70180 129.46110 1.03–34 Complete this table for H 2 O:T, °C P, kPa v, m 3 /kg Phase description140 0.05550 Saturated liquid125 750500 0.1403–35 Complete this table for H 2 O:T, °C P, kPa u, kJ/kg Phase description400 1450220 Saturated vapor190 25004000 30403–36 A 1.8-m 3 rigid tank contains steam at 220°C. Onethirdof the volume is in the liquid phase and the rest is in thevapor form. Determine (a) the pressure of the steam, (b) thequality of the saturated mixture, and (c) the density of themixture.Steam1.8 m 3220°CFIGURE P3–363–37 A piston–cylinder device contains 0.85 kg of refrigerant-134a at 10°C. The piston that is free to move has a mass of12 kg and a diameter of 25 cm. The local atmospheric pressureis 88 kPa. Now, heat is transferred to refrigerant-134aR-134a0.85 kg–10°CFIGURE P3–37Q