643_Physics ProblemsTechnical Physics

643_Physics ProblemsTechnical Physics - Chapter 22 P22.34...

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Chapter 22 645 P22.34 (a), (b) The quantity of gas is n PV RT En R T P V AA A A A == ×× = === × × = 100 10 500 10 8314 293 00205 5 2 5 2 5 2 100 10 500 10 125 36 Pa m Jmo lK K mol Pa m J 3 int, 3 ej e j bg af e j . . In process AB , PP V V BA A B = F H G I K J = × γ 100 10 8 00 1 84 10 3 1.40 6 Pa Pa .. T nR R T B BB = = 184 10 500 10 800 673 5 2 5 2 0 020 5 8 314 673 287 66 Pa m mol J mol K K mol J mol K K J 3 int, e j b g b g so EQ W W AB int, out out J J J =−= = −= 287 125 162 0 W AB =− 162 J Process BC takes us to: P nRT V R T W Q Q C C C C BC BC × = = = = 0 020 5 8 314 1 023 62 5 10 279 10 5 2 5 2 0 020 5 8 314 1 023 436 436 287 149 0 149 6 6 . . mol J mol K K m Pa mol J mol K K J J J J 3 int, C int, out b g b g b g b g In process CD : V V T nR R T W W W DC C D D DD CD CD = F H G I K J F H G I K J = = = = 1 152 10 445 5 2 5 2 0 020 5 8 314 445 190 190 436 246 0 246 6 1.40 5 56 . . . . Pa Pa Pa m mol J mol K
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