Examples_ideal_solutions

Examples_ideal_solutions - of A whereas the vapor in...

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1 1. Liquids A and B form ideal solutions. A mixture of the vapors which is 40% mole in A is contained in a piston and cylinder arrangement which is kept under constant temperature, T . The system is then slowly compressed. Given that o A P and o B P are 0.4 and 1.2 atm respectively at T , calculate the total pressure at which liquid first begins to condense out and also the composition of the liquid. Calculate the composition of that solution whose normal b.p. is T. 2. Liquids A and B form an ideal solution. At 50 o C the total vapor pressure of a solution consisting of 1 mole of A and 2 moles of B is 250 mmHg. On addition of 1.0 more mole of A to the solution the vapor pressure increases to 300 mmHg. Calculate o A P and o B P .

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2 3. Liquids A and B form an ideal solution. A certain solution contains 25 mole %
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Unformatted text preview: of A whereas the vapor in equilibrium with the solution at 25 o C contains 50 mole % of A. ∆ H vap (A) = 5 kcal/mole and ∆ H vap (B) = 7 kcal/mole. a) Calculate the ratio of the vapor pressure of pure A to that of pure B at 25 o C. b) Calculate the value for this same ratio at 100 o C. (Just set up equations for the ratio. No need to get a numerical answer.) 3 4. A and B form an ideal solution at 298 K, with x A = 0.600, P A * = 105 Torr, and P B * = 63.5 Torr. a) Calculate the partial pressures of A and B in the gas phase. b) A portion of the gas phase is removed and condensed in a separate container. Calculate the partial pressures of A and B in equilibrium with this liquid sample at 298 K....
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Examples_ideal_solutions - of A whereas the vapor in...

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