In class, we covered three methods to relate the composition in the liquid phase to the composition in the vapor phase: Raoult's law, Henry's law and using equilibrium diagrams. Raoult's law and Henry's law are for ideal solutions. There is a modified Raoult's law that can be used for non-ideal solutions: yiP=xiipi Where A is the activity coefficient, which is a function of temperature and composition and can be found experimentally and the subscript i is the species. For the system of methanol (A) and methyl acetate (B), the following equations provides a reasonable correlation for the activity coefficient: ln(A)=axB2ln(B)=axA2a=2.7710.00523T a) State the assumptions for Raoult's law and Henry's law. For which situations do you think the modified Raoult's law will be valid where the regular Raoult's law is not? b) Calculate P and yi for T=318K and xA=0.25