Osmotic Pressure(1) S.J.T.0. Phase Transformation and Applications Page 7/45 a-u=RT'Inx4 Raoult's law 半透膜！ HA-H=RTIn(1-xB)=-RTXB -Etan Aqueous solution (impure water) Flexible wall Π=RT Semipermeable Pure water membrane Figure 7.14 Osmotic pressure. SJTU Thermodynamics of Materials Fall 2010 X.J.Jin Lecture 13 Phase RulePhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2010 © X. J. Jin Lecture 13 Phase Rule Page 7/45 Osmotic Pressure (1) A A A − = RT ln x o μ μ ( ) A A B RTxB − = RT ln 1− x = − o μ μ ∫ +Π − = = − Π PP A A V AdP V A o μ μ A B V x Π = RT Raoult’s law 半透膜！