Twenty pounds of air initially at 15608R, 3 atm fills a
Chapter 7, Problem 7.25(choose chapter or problem)
Twenty pounds of air initially at 1560\(^{\circ}\)R, 3 atm fills a rigid tank. The air is cooled to 1040\(^{\circ}\)R, 2 atm. For the air modeled as an ideal gas
(a) indicate the initial state, final state, and dead state on a T–v diagram.
(b) determine the heat transfer, in Btu.
(c) determine the change in exergy, in Btu, and interpret the sign using the T–v diagram of part (a).
Let \(T_{0}\) = 520\(^{\circ}\)R, \(p_{0}\) = 1 atm and ignore the effects of motion and gravity.
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