Applying the Entropy Balance: Closed SystemsTwo insulated
Chapter 6, Problem 65P(choose chapter or problem)
Two insulated tanks are connected by a valve. One tank initially contains 1.2 lb of air at \(240^{\circ} \mathrm{F}\), 30 psia, and the other contains 1.5 lb of air at \(60^{\circ} \mathrm{F}\), 14.7 psia. The valve is opened and the two quantities of air are allowed to mix until equilibrium is attained. Employing the ideal gas model with \(c_{v}=0.18 \mathrm{\ Btu} / \mathrm{lb} \cdot{ }^{\circ} \mathrm{R}\) determine
(a) the final temperature, in \({ }^{\circ} \mathrm{F}\).
(b) the final pressure, in psia.
(c) the amount of entropy produced, in \(\mathrm{Btu} /{ }^{\circ} \mathrm{R}\).
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