Estimate the pressure and composition of vapor phase that is in equilibrium witha liquid mixture of toluene (1) and methyl ethyl ketone (2) at 323 K, if the liquid is 31 % (by mole) of component 1. The experimentally determined infinite dilution activity coefficient for component 1 is 1.2189 and the experimentally determined infinite dilution activity coefficient for component 2 is 1.4506.
For an infinitely dilute solution:
Which gives two equations and two unknowns:
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Using Raoult’s Law for each component:
Results in two equations with two unknowns:
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