658_Physics ProblemsTechnical Physics

658_Physics ProblemsTechnical Physics - 660 P22.70 Heat...

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660 Heat Engines, Entropy, and the Second Law of Thermodynamics P22.70 (a) Use the equation of state for an ideal gas V nRT P V V A C = = × = × 1008314 600 25 0 1 013 10 197 10 1008314 400 1013 10 32 8 10 5 3 5 3 .. . . . af a f ej a f m m 3 3 FIG. P22.70 Since AB is isothermal, PV AA BB = and since BC is adiabatic, B B C C γγ = Combining these expressions, V P P V V B C A C A = F H G I K J L N M M O Q P P = F H G I K J × × L N M M M O Q P P P γ 11 3 1.40 3 10400 100 25 0 32 8 10 bg . . . . . m m 3 3 V B 11 9 10 3 . m 3 Similarly, V P P V V D A C A C = F H G I K J L N M M O Q P P = F H G I K J × × L N M M M O Q P P P 3 1.40 3 25 0 32 8 10 . . . . . m m 3 3 or V D 544 10 3 m 3 Since AB is isothermal, = and PP V V BA A B = F H G I K J = × × F H G I K J = 25 0 11 9 10 414 3 . . . atm 1.97 10 m m atm 33 3 Also, CD is an isothermal and V V DC C D = F H G I K J = × × F H G I K J = 603 3 3 . . . atm 32.8 10 m m atm 3 3 Solving part (c) before part (b): (c) For this Carnot cycle, e T T c c h =− =− = 400 0333
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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