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2- A liquid solution of ethane (1) and propane (2) is at equilibrium with its vapor at P = 20 bar and T = 300K.
2- A liquid solution of ethane (1) and propane (2) is at equilibrium with its vapor at P = 20 bar and T = 300K. The liquid composition is x = x3 = 0.5. Using the virial equation of state 2 = 1+ estimate the composition of the vapor phase. Combining rule and second virial coefficients for the above system: BP RT B=EX, *1 X; Bij m3 = m3 B1 (300K) = 2 x 10-4 mol B22(300K) = 4 x 10-4 mol m3 B12(300K) = 3 x 10-4 mol Assume the liquid phase is an ideal mixture: psat (300K) = 40 bar Pat (300K) = 10 bar
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