Answer: Applying the Entropy Balance: Closed SystemsA
Chapter 6, Problem 56P(choose chapter or problem)
A rigid, insulated vessel is divided into two compartments connected by a valve. Initially, one compartment, occupying one-third of the total volume, contains air at \(500^{\circ} \mathrm{R}\), and the other is evacuated. The valve is opened and the air is allowed to fill the entire volume. Assuming the ideal gas model, determine the final temperature of the air, in \({ }^{\circ} \mathrm{R}\), and the amount of entropy produced, in \(\mathrm{Btu} /{ }^{\circ} \mathrm{R}\) per lb of air.
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