Answer to Question #173962 in Mechanical Engineering for Randal Rodriguez

Question #173962

Note: Draw the P-V, T-S diagrams for all problems

7. During a reversible process 320 kJ/s of heat are given off by 1.5 kg m /s of a certain gas while its

temperature remains constant at 27.7 o C. For this gas c p = 2.232 kJ/kg m - o K and k = 1.303. The initial pressure is 590 kPaa. Find a) final volume, b) work non flow (kJ/s), c) ∆S (kJ/ o K -s)

8. An ideal compressor compresses 12 kg/min of air isothermally from 99 kPaa and a specific volume of

0.81 m 3 /kg m to a final pressure of 600 kPaa. Determine a) Power (kW) required to drive the compressor, b) change in entropy (kJ/ O K), c) heat transferred.

9. The gain in entropy during an isothermal nonflow process of 5 lb m of air at 60 o F is 0.462 BTU/ o R. What is a) the ratio V 2 /V 1 , b) P 2 /P 1 , c) Work (BTU)

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