In a closed (fixed-mass) system, an ideal gasundergoes a process from 75 psia and 5 ft to 25 psiaand 9.68 ft. For this process, AH = -62 Btu andCy,avg =0.754 Btu/lbm R. Determine (a) AU,(b) cp.avgs and (c) the specific gas constant R.

Answered: In a closed (fixed-mass) system, an…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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In a closed (fixed-mass) system, an ideal gas
undergoes a process from 75 psia and 5 ft to 25 psia
and 9.68 ft. For this process, AH = -62 Btu and
Cy,avg =0.754 Btu/lbm R. Determine (a) AU,
(b) cp.avgs and (c) the specific gas constant R.

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$g i v e n i n i t i a l P r e s s u r e P_{1} = 75 p s i a i n i t i a l v o l u m e V_{1} = 5 f t^{3} f i n a l P r e s s u r e P_{2} = 25 p s i a f i n a l v o l u m e V_{2} = 9.68 f t^{3} c h a n g e i n e n t h a l p y ∆ H = - 62 B T U C_{V a v g} = 0.754 B t u / l b m . R$

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