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Split_00036 - 8.61(a i FG mIJ HV K Expt 1 = b4.4553...

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8- 36 8.61 (a) i) Expt 1 F H G I K J = = = m V SG liquid liquid kg 2.000 L kg L 4 4553 32551 0 600 0 600 . . . . b g b g ii) Expt 2 Mass of gas = = = 32571 32551 0 0020 2 0 . . . . b g kg kg g Moles of gas = = 2.000 L 273 K mm Hg 1 mol 363 K 760 mm Hg 22.4 liters STP mol 763 500 0 0232 b g b g . Molecular weight = = 2 0 86 . g 0.0232 mol g mol b g b g iii) Expt. 1 2.000 liters 10 cm 0.600 g 1 mol 1 liter cm 86 g mol liquid 3 3 3 b g = = n 14 Energy balance : The data show that C v is independent of temperature Q U nC T C Q n T v v = = = = = = = Δ Δ Δ J 14 mols 2.4 K J mol K 284.2 K J 14 mols 2.4 K J mol K 331.2 K liquid b g b gb g b gb g 800 24 800 24 @ @ C v b g liquid J mol K 24 Expt. 2 mol from ii vapor b g b g = n 0 0232 . C a bT Q a bT dT a T T b T T a b v T T = + = + = + L N M O Q P L N M O Q P L N M O Q P U V | | W | | = − = z 0 0232 0 0232 2 130 366 9 3630 130 492 7 490 0 4 069 0 05052 2 1 2 2 1 2 2 2 2 2 1 2 . ( ) . ( ) (
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