上游充通大 SHANGHAI JIAO TONG UNIVERSITY 4G= L(T-T)RTI o T A1.pure pure water ice G > Tm solution G Lower temperature ice T pure water solution △melting L(T-T) NAIIAOTONG △G=RTln a1solution al.pure At T',If pure solid is in equilibrium with solution: AG-L(-T)+RT'In =0 A1.pureT’ G ice ice pure water solution l pure l solution a a G RT . ,   ln m m melting ( - ) T L T T G  G l pure l solution a a RT T L T T G . , m m ln ( - )    ln 0 ( - ) . , m m     l pure l solution a a RT T L T T G At T’, If pure solid is in equilibrium with solution: Tm pure water solution T’ Lower temperature