27. Solving a chemistry problem

3. Benzene and toluene form an almost ideal solution; The boiling point of pure benzene is 80.1 C. Calculate the difference in the chemical potentials of benzene in solution and in pure form at the boiling point and Xbenzene = - 0.30. What would the vapor pressure be if the activity coefficient of benzene in this solution were actually 0.93. not 1.00?