a) The following temperature composition data were obtained for a mixture of two liquids A and B at one atmosphere, where x is the mole fraction of A in the liquid and y is the mole fraction of A in the vapour, at equilibrium. t/ oC 125 130 135 140 145 150 xA 0.91 0.65 0.45 0.30 0.18 0.098 yA 0.99 0.91 0.77 0.61 0.45 0.25 the boiling points are 124 oC for A and 155 oC for B. Plot the temperature-composition diagram for the mixture on a graph sheet. What is the composition of the vapour in the equilibrium with the liquid of composition i) xA = 0.50 and ii) xB= 0.33

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