相图 Phase Diagram 相转换 Phase Transition Spontaneous conversion of one phase into another occurring at a characteristic temperature for a given pressure Consider water at p=1 atm Solid Ice is stable phase when T<0 μe< iquid water when7<0 Liquid Liquid water is stable phase when T>0 Gas Pice >Liquid water when T>0 Solid Transition Temperature, Ttrs stable stable stable Temperature when chemical potentials are equa; for example,μlce=μ uid water at T=0 Temperature, T相 图 Phase Diagram 相 转 换