Considering Constant-Composition ProcessesA mixture

Chapter 12, Problem 14P

(choose chapter or problem)

A mixture consisting of 0.6 lbmol of \(\mathbf{N}_{2}\) and 0.4 lbmol of \(\mathbf{O}_{2}\) is compressed isothermally at \(1000^{\circ} \mathrm{R}\) from 1 to 3 atm. During the process, there is energy transfer by heat from the mixture to the surroundings, which are at \(40^{\circ} \mathrm{F}\). For the mixture, determine

(a) the work, in Btu.

(b) the heat transfer, in Btu.

(c) the amount of entropy produced, in \(\mathrm{Btu} /{ }^{\circ} \mathrm{R} .\)

For an enlarged system that includes the mixture and enough of its immediate surroundings that heat transfer occurs at \(40^{\circ} \mathrm{F}\), determine the amount of entropy produced, in \(\mathrm{Btu} /{ }^{\circ} \mathrm{R} .\) Discuss.

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