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Engineering, 05.10.2019 12:00 7431335

Awell-insulated rigid tank contains 6 lbm of saturated liquid-vapor mixture of water at 30 psia. initially, 20% of the mass is in the liquid phase. an electric resistance heater placed in the tank is turned on and kept on until all the liquid in the tank is vaporized. assuming the surroundings to be at 75°f and 14.7 psia, determine (a) the exergy destruction and (b) the second-law efficiency for this process.

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