583_Physics ProblemsTechnical Physics

583_Physics ProblemsTechnical Physics - Chapter 20 Section...

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Chapter 20 585 Section 20.4 Work and Heat in Thermodynamic Processes P20.23 WP d V if i f =− z The work done on the gas is the negative of the area under the curve PV = α 2 between V i and V f . WV d V V V VV if i f fi == = z αα 23 3 1 3 22 1 0 0 2 0 0 ej .. m m 33 P O V 1.00 m 3 2.00 m 3 P = V 2 f i FIG. P20.23 W if × + L N M O Q P 1 3 5 00 1 013 10 2 00 1 00 118 5 . . . atm m Pa atm m m MJ 63 3 e j e j e j P20.24 (a) d V z W W if × + −× + 600 10 200 100 400 10 300 200 200 10 400 300 12 0 6 6 6 . . . . Pa m Pa m Pa m MJ 3 3 3 a f a f a f (b) W =+ 12 0 . M J FIG. P20.24 P20.25 VP nR P TT n R T F H G I K J −= = = ∆∆ di af a f 0 200 8 314 280 466 J P20.26 d V P d V P V n R T n R T T i f i f = − zz 21 bg P20.27 During the heating process P P V V i i = F H G I K J . (a) d V P V VdV i f i i V V i i F H G I K J 3 W P V V P V P V i i V V i i ii
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