Your supervisor has assigned you to obtain parameters A and B for the three-suffi x Margules equation to input in the company’s phase equilibrium computer database. The binary mixture of interest is benzene

(a) in 1-propanol

(b) at 75°C. You cannot fi nd any values in the literature for the three-suffi x Margules equation, but you do fi nd the following values from the van Laar (vL) equation:

(a) Use these values to estimate the three-suffi x Margules equation parameters A and B.

(b) Calculate the fugacity of benzene in the liquid,in a mixture of 30 mole% benzene at 75°C and 81 kPa.

(c) If this liquid mixture is in equilibrium with its vapor, what is the mole fraction of benzene in the vapor?

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AUL = 3000 mol and BOL = 5040 mol