Chemical Engineering > GATE 2015 > Vapor-Liquid Equilibrium
A binary mixture of components (1) and (2) forms an azeotrope at 130°C and x1 = 0.3. The liquid phase non-ideality is described by ln γ1 = A x22 and ln γ2 = A x12, where γ1, γ2 are the activity coefficients, and x1, x2 are the liquid phase mole fractions. For both components, the fugacity coefficients are 0.9 at the azeotropic composition. Saturated vapor pressures at 130°C are P1sat = 70 bar and P2sat = 30 bar. The total pressure in bars for the above azeotropic system (up to two decimal places) is _______.

Correct : 27.5

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