14. A polytropic process of air from 150 psia, 300F, and 1 f occurs to p-20...

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14. A polytropic process of air from 150 psia, 300°F, and 1 f occurs to p-20 psia in accordance with pV3-C. Determine (a) Ta and V2. (b) AU, AH and AS, (c) pdV and-Vdp. (d) Compute the heat from the polytropic specific heat and check by the equationQ AU+pdV. (e) Find the nonflow work and (f) the steady flow work for AK-0. Ans. (a) 17.4°F, 4.711f (b) -25.81 Btu, -36.14 Btu, 0.0141 Btu R: (c) 34.41 Btu, 44.73 Btu; (d) 8.60 Btu; (e) 34.41 Btu; (f) 44.73 Btu 14. A polytropic process of air from 150 psia, 300°F, and 1 f occurs to p-20 psia in accordance with pV3-C. Determine (a) Ta and V2. (b) AU, AH and AS, (c) pdV and-Vdp. (d) Compute the heat from the polytropic specific heat and check by the equationQ AU+pdV. (e) Find the nonflow work and (f) the steady flow work for AK-0. Ans. (a) 17.4°F, 4.711f (b) -25.81 Btu, -36.14 Btu, 0.0141 Btu R: (c) 34.41 Btu, 44.73 Btu; (d) 8.60 Btu; (e) 34.41 Btu; (f) 44.73 Btu