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A 29.6-kg iron block initially at 370°C is quenched in an insulated tank that contains 136.3 kg of water at 11°C. Assuming the water that vaporizes during the process condenses back in the tank, determine the total entropy change during this process.

Solution

A 51-kg copper block initially at 114°C is dropped into an insulated 
tank that contains 174 L of water at 20°C. Determine the final 
equilibrium temperature and the total entropy change for this process. 

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Solution

A 1.1-ft3 well-insulated rigid can initially contains refrigerant R-134a at 140 
psia and 50 F. Now a crack develops in the can, and the refrigerant starts to leak out 
slowly. Assuming the refrigerant remaining in the can has undergone a reversible, 
adiabatic process, determine the mass in the can when the pressure drops to 30 psia

Chegg: Book Solution

Solution

0.5 kg of R-134a is expanded isentropically from 600 kpa to 30 degreesC to 140 kpa. Determine the total heat transfer and work production for this expansion.

Solution

Steam is expanded in an isentropic turbine with a single inlet and outlet. At the inlet, the steam is at 2 MPa and 360 degrees C. The steam pressure at the outlet is 100 kPa. Calculate the work produced by the turbine, in kJ/kg.

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Solution

A piston–cylinder device contains 1.4 kg of saturated water vapor at 200°C. Heat is now transferred to steam, and steam expands reversibly and isothermally to a final pressure of 800 kPa. Determine the heat transferred and the work done during this process. 

PDF: kau
PDF: ku

Solution