(Smith, p. 388, q. 13.18) A liquid mixture of cyclohexanone(1)/phenol(2), with ?1 = 0.6, is in equilibrium with its vapor at 144 ÂșC. Determine the equilibrium pressure (?) and the vapor composition (?1) from the following information: âą lnÎł1 = ??2 2 lnÎł2 = ??1 2 âą At 144 ÂșC, ?1 ??? = 75.20 kPa and ?2 ??? = 31.66 kPa âą The system forms an azeotrope at 144 ÂșC, in which ?1 ?? = ?1 ?? = 0.294.