PLEASE SOLVE ON PAPER, DO NOT USE CHATGBP

Pure A exists in solid-vapor equilibrium in a rigid container at 150 K and 10 bar.

Z=1+ BP/RT. (B = 45 x 10-5 m3/mol)

At temperature of 150 K, solid A is mixed with pure liquid B to yield a saturated liquid phase containing both A and B. Vapor phase can be considered as pure A as vapor pressure of B at this temperature is negligible. The mole fraction of A in liquid solution is 0.3 and the pressure is measured as 6 bar. Calculate the activity coefficient of A in this liquid solution. (Poynting factor can be assumed to be 1.)