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Ten kmol per hour of air is throttled from upstream conditions of 298.15 K (25°C) and 10 bar to a downstream pressure of 1.2 bar. Assume air to be an ideal gas with Cp = (7/2)R.
(a) What is the downstream temperature?
(b) What is the entropy change of the air in J mol-l K-l?
(c) What is the rate of entropy generation in W K-l?
(d) If the surroundings are at 293.15 K (20°C), what is the lost work?
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What is the temperature drop of the air, if air is assumed to be an ideal gas for which Cp = (7/2)R?
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