Chem340 Homework 9 P8.3)An ideal solution is formed by mixing liquids A and B at 298 K. The vapor pressure of pure A is 180. Torr and that of pure B is 82.1 Torr. If the mole fraction of A in the vapor is 0.450, what is the mole fraction of A in the solution? The mol fraction of A in the ideal solution of liquids A and B is given by: 0.2720.450Torr180Torr82.1Torr180Torr82.10.450yppppyxAABABAAP8.4)A and B form an ideal solution. At a total pressure of 0.900 bar, yA= 0.450 and xA= 0.650. Using this information, calculate the vapor pressure of pure A and of pure B. ***********0.900 bar 0.4500.623 bar0.6500.4500.6500.4500.6501 0.4502.270.4501 0.6501.414 bartotalA aBtotaltotalBtotalaAABAaBAABABABPxPyPPyPPxyPxPPPyPPPPPP8.5)A and B form an ideal solution at 298 K, with xA= 0.600, PA*105 Torr, and PB*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. a) Calculate the partial pressures of A and B in the gas phase. **0.600 105 Torr = 63.0 Torr10.400 63.5 Torr = 25.4 TorrAAABABPxPPb) 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. The composition of the initial gas is given by 63.0 Torr0.713;0.28788.4 TorrAABPyyPP**For the portion removed, the new and values are the previous and values.0.713 105 Torr = 74.9 Torr10.287 63.5 Torr = 18.2 TorrABxxPPP8.7)Assume that 1-bromobutane and 1-chlorobutane form an ideal solution. At 273 K, Pchloro*3790 Paand Pbromo*1394 Pa.When only a trace of liquid is present at 273 K, ychloro= 0.75. a.Calculate the total pressure above the solution. b.Calculate the mole fraction of 1-chlorobutane in the solution. c.What value would Zchlorohave in order for there to be 4.86 mol of liquid and 3.21 mol of gas at a total pressure equal to that in part (a)? [Note: This composition is different from that of part (a).] a)Calculate the total pressure above the solution.
***total3790 Pa P3790 Pa 1394 Pa0.753790 Pa 1394 Pa3790 Pa 1394 Pa2651 Pa3790 Pa0.753790 Pa 1394 PachlorototalchlorobromochlorototalchlorobromototaltotalPPyPPPb) Calculate the mole fraction of 1-chlorobutane in the solution. *12651 Pa 1394 Pa0.5253790 Pa 1394 PatotalchlorochlorochlorobromototalbromochlorochlorobromoPxPxPxc) What value would Zchlorohave in order that there are 4.86 moles of liquid and 3.21 moles of gas at a total pressure equal to that in part a)? (This composition is different than that in part a.) ***3790 Pa 2651 Pa3790 Pa 1394 Pa0.7502651 Pa3790 Pa 1394 Pa0.750 13chlorototalchlorobromochlorototalchlorobromochlorobromochlorochlorobromochlorochloroyPyPxPy94 Pa0.5253790 Pa + 1394 Pa3790 Pa0.7503.21 mol 0.750 + 4.86 mol 0.5250.613.21 mol + 4.86 moltottotliq
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