PHASE DIAGRAMS The vapour pressure of pure liquid CCl4 is 23 kPa and its Henry's law constant in liquid Br2 is 73 kPa at 20°C. Calculate the vapour pressure of each component, the total pressure, and the composition of the vapour phase (y and y B) when the mole fraction of CC₁ is 0.066.
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- At 90 °C, the vapour pressure of methylbenzene is 53.3 kPa and that of 1,2-dimethylbenzene is 20.0 kPa. What is the composition of a liquid mixture that boils at 90 °C when the pressure is 0.50 atm? What is the composition of the vapour produced?The vapour pressure of pure liquid A at 300 K is 76.7 kPa and that of pure liquid B is 52.0 kPa. These two compounds form ideal liquid and gaseous mixtures. Consider the equilibrium composition of a mixture in which the mole fraction of A in the vapour is 0.350. Calculate the total pressure of the vapour and the composition of the liquid mixture.At 25 °C, the vapour pressure of pure benzene is 12.8 kPa and the vapour pressure of pure methylbenzene (toluene) is 3.8 kPa. Consider a liquid mixture with mole ratio 30% benzene-70% methylbenzene, which you can treat as an ideal liquid mixture, in a closed container. a) Calculate the mole ratio of benzene and methylbenzene in the vapour.
- Suppose that in a phase diagram, when the sample was prepared with the mole fraction of component A equal to 0.40 it was found that the compositions of the two phases in equilibrium corresponded to the mole fractions xA,α = 0.60 and xA,β = 0.20. What is the ratio of amounts of the two phases?At 300 K, the vapour pressures of dilute solutions of HCI in liquid GeCI4 are as follows: x(HCI) 0.005 0.012 0.019p/kPa 320 76.9 121 .8 Show that the solution obeys Henry's law in th is range of mole fractions and calculate Henry's law constant at 300 K.At 90°C, the vapour pressure of methylbenzene is 54kPa and that of 1,3-dimethylbenzene is 18.0 kPa. What is the molar fraction of methylbenzene in the gas phase above the mixture containing 1 mol of methylbenzene and 2mol of 1,3-dimethylbenzene at this temperature (assume that these solvents form ideal solutions).
- The vapour pressure of benzene is 53.3 kPa at 60.6 °C, but it fell to 51.5 kPa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. Calculate the molar mass of the compound.At 90 °C the vapour pressure of toluene (methylbenzene) is 53 kPa and that of o-xylene (1,2-dimethylbenzene) is 20 kPa. (a) What is the molar fraction of toluene in the liquid mixture when the total vapor pressure is 0.50 atm at 90 °C? In liquid, xtoluene =........... At 90 °C the vapour pressure of toluene (methylbenzene) is 53 kPa and that of o-xylene (1,2-dimethylbenzene) is 20 kPa. (b) What is the molar fraction of toluene in the gas phase when the total vapor pressure is 0.50 atm at 90 °C? In gas, xtoluene = __________ .Benzene and methylbenzene (toluene) form nearly ideal solutions. Consider an equimolar solution of benzene and methylbenzene. At 20 °C the vapour pressures of pure benzene and methylbenzene are 9.9 kPa and 2.9 kPa, respectively. The solution is boiled by reducing the external pressure below the vapour pressure. Calculate (a) the pressure when boiling begins, (b) the composition of each component in the vapour, and (c) the vapour pressure when only a few drops of liquid remain. Assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °C.
- The boiling point at 1.236 atm pressure of a solution of 0.6589 mole fraction of benzene and 0.3411 mole fraction toluene is 88°C. At this temperature the the vapour pressures of pure benzene and toluene are 1.276 and 0.5059 atm, respectively. What is the vapour composition that boils off this liquid?The vapour pressure of pure liquids A and B at 400 K are 450 and 700 mmHg respectively. Find out the composition of liquid mixture if total vapour pressure at this temperature is 600 mmHg.At 90 °c the vapour pressure of methylbenzene (toluene) is 53 kPa and that of 1.2-dimethylbenzene (o-xylene) is 20 kPa. What is the composition of the liquid mixture that boils at 25 °c when the pressure is 0.50 atm? What is thecomposition of the vapour produced?