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{"ops":[{"insert":"Note: Draw the P-V, T-S diagrams for all problems\n10. An adiabatic expansion of air occurs through a nozzle (W s = 0) from 850 kPa and 75 o C to 140 kPaa. For an isentropic expansion find: specific volume (m 3 \/kg m ), temperature ( o C), and velocity (m\/s) at the exit section assuming initial kinetic energy is negligible. \n11. 2 lb m \/min of a certain gas whose R = 767 ft-lb f \/lb m - o R, undergoes a steady flow isentropic process form 50 psia, 90 ft 3 \/lb m and 300 ft\/s, until the pressure and velocity are doubled, and the volume is reduced by one third of its initial value. Determine a) \u2206H, b) \u2206U, c) Work.\n12. Assume 5 ft 3 \/s of Hydrogen at 15 psia and 80 o F are compressed during an irreversible adiabatic\nprocess to 90 psia and 522 o F. For a non-flow process determine a) k, b) V 2 , c) W, d) \u0394U and e) \u0394S.\n\n"}]}
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