Question

The measurement of the compositions of the liquid and vapor phases, in equilibrium, of acetone (A) and methanol (M) solutions showed

that, at 57.2 ºC, under a pressure of 1.00 atm, we have xA = 0.430 when yA = 0.536. Calculate the activities and coefficients of

activity of the two components of this solution based on Raoult's law. Vapor pressures of pure components,

at the temperature mentioned, they are: pA

∗

= 105 kPa and pM

∗

= 73.5 kPa. (xA is the molar fraction in the liquid and yA is the molar fraction

corresponding to the steam).