Calculate the net entropy change of the system

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Reference no: EM131233149

1. A hollow steel sphere with a 2-ft inside diameter and a 0.1-in.-thick wall contains water at 300 lbf /in.², 500 F. The system (steel plus water) cools to the ambient temperature, 90 F. Calculate the net entropy change of the system and its surroundings for this process.

2. One lbm of air at 540 R is mixed with 2 lbm air at 720 R in a process at a constant 15 psia and Q = 0. Find the final T and the entropy generation in the process.

3. One lbm air at 15 psia is mixed with 2 lbm air at 30 psia, both at 540 R, in a rigid, insulated tank. Find the final state (P, T) and the entropy generation in the process.

Reference no: EM131233149

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