Osmotic Pressure(1) S.J.T.U. Phase Transformation and Applications Page 7/45 ua-u RTInxa Raoult's law 半透膜！ Ha-H RT In(1-xB)=-RTxB g-上=-gn了 Aqueous solution (impure water) Flexible wall Π=RT XB Semipermeable Pure water membrane Figure 7.14 Osmotic pressure. SJTU Thermodynamics of Materials Spring 2010 ©X.J.Jin Lecture 13 Phase RulePhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2010 © X. J. Jin Lecture 13 Phase Rule Page 7/45 Osmotic Pressure (1) A A A   RT ln x      A A B RTxB   RT ln 1 x             P P A A V A dP V A    A B V x   RT Raoult’s law 半透膜！