555_Physics ProblemsTechnical Physics

555_Physics ProblemsTechnical Physics - Chapter 19 P19.29...

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Chapter 19 557 P19.29 The equation of state of an ideal gas is PV nRT = so we need to solve for the number of moles to find N . n PV RT Nn N A == × × × 101 10 100 200 300 8314 293 249 10 2 49 10 6 022 10 1 50 10 5 5 52 3 2 9 .. . . . . . Nm m m m Jmo lK K mol mol molecules mol molecules 2 ej af bg a f *P19.30 (a) PV n RT m M RT ii i i i i m MPV RT i i ×× × ⋅ 400 10 38 3 1 4 106 10 3 3 21 . . . kg 1.013 10 N 4 6.37 10 m mole K mole m Nm 50 K kg 56 2 π (b) nRT ff = 21 1 06 10 8 00 10 50 100 56 9 21 20 ⋅= ×+ × × F H G I K J = F H G I K J = . kg kg 1.06 10 kg K K 1 1.76 K 21 T T f f P19.31 P nRT V F H G I K J F H G I K J × F H G I K J 900 773 161 159 3 . . g 18.0 g mol J mol K K 2.00 10 m MPa atm 3 P19.32 (a) TT P P 2 1 300 3 900 = K K a f (b) 22 11 300 2 2 1 200 = K P19.33 F y = 0 : ρρ out in kg gV gV g −− = 200 0 out in 3 m k g −= 400 200 The density of the air outside is
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