At 90°C, a binary-mixture of n-propanol

(a) and water

(b) follows the van Laar equation with A = 7,850 [J/mol] and B = 3,410 [J/mol].

(a) Consider a liquid with 60 mole% n-propanol at 90°C in equilibrium with its vapor, calculate the fugacity of water in the liquid.

(b) What is the partial pressure of water in the vapor?

(c) Calculate the value of the Henry’s law constant for water.