A binary mixture of components M and N forms an azeotrope at 120°C and liquid phase mole fraction of component 1 is x, = 0.3. The liquid phase non-ideality is given by In 7, = Ax ,Iny, = Ax² . Here, 7,,% are the activity coefficients and x,.x, are the liquid phase mole fractions. The fugacity coefficients of both the components at azeotropic composition is 0.7. Saturated vapor pressure at 120°C is, P" = 60 bar P = 30 bar Give total pressure for azeotropic system. a) 48 bar b) 38 bar c) 45 bar d) 56 bar

Q3. The following information on the pressure-temperature diagram of nitrogen: P (atm) T(K) 0.123 33.3978 1.0 Triple point Critical point Normal boiling point Density of N₂(s): 1.03g/cm-³ N₂(1): 0.808g/cm-³ 63.15 126.19 77.35 Using this information, sketch a phase-equilibrium diagram of nitrogen and mark each point. Then, describe why the slope of each phase/phase equilibrium is positive or negative.

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Solve the following questions related to fugacity of a liquid. Assume that liquid is incompressible and thus the 1 molar volume of the liquid is constant. (You may assume that Psat is low enough that sat for all parts of this = problem. You will also need to look up or calculate the molar volume of water.) b) Calculate the fugacity and the fugacity coefficient of liquid water at 100°C and 1000 bar.