Considering Constant-Composition ProcessesA gas mixture in
Chapter 12, Problem 11P(choose chapter or problem)
A gas mixture in a piston–cylinder assembly consists of 2 lb of \(\mathbf{N}_{2}\) and 3 lb of He. Determine
(a) the composition in terms of mass fractions.
(b) the composition in terms of mole fractions.
(c) the heat transfer, in Btu, required to increase the mixture temperature from 70 to \(150^{\circ} \mathrm{F}\), while keeping the pressure constant.
(d) the change in entropy of the mixture for the process of part (c), in \9\mathrm{Btu} /{ }^{\circ} \mathrm{R}\).
For parts (c) and (d), use the ideal gas model with constant specific heats.
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