Question

Arigid tank of volume 0.5 m3 is connected to a piston-cylinder assembly by a valve as shown in the diagram below. Both vessels contain pure water. They are immersed in a constant- temperature bath at 200°C and 600 kPa. Consider the tank and the piston-cylinder as- sembly as the system and the constant-temperature bath as the surroundings. Initially the valve is closed, and both units are in equilibrium with the surroundings (the bath). The rigid tank contains saturated water with a quality of 95% (i.e., 95% of the mass of the water is vapor. The piston-cylinder assembly initially has a volume of 0.1 m3. The valve is then opened. The water flows into the piston-cylinder assembly until equilibrium is obtained. For this process, determine the work done, W, by the piston; the change in internal energy, AU of the system; and the heat transferred, Q. Additionally, calculate the change in entropy for the system, the surroundings, and the universe Surroundings Temperature bath TB 200 C P = 600 kPa Pure H2O V= 0.5 m3 Quality-95% H20 Vnitial 0.1 m3

Answer 1

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