Phase (Britannica)2 S.J.T.0. Phase Transformation and Applications Page 15/45 Matter is considered to form one homogeneous phase if its atomic or molecular dispersion is uniform;e.g.,a glass of water containing dissolved salt,sugar,and a dye constitutes only a single liquid phase.If hundreds of grains of sand were added,all the grains together would constitute only a single additional (solid)phase The different phases of a pure substance bear a fixed relationship to one another in terms of temperature and pressure.Thus,if the pressure on some liquids is raised,they will freeze at a higher temperature.This relationship is extremely important in industrial as well as scientific work. 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 15/45 Phase (Britannica) 2 Matter is considered to form one homogeneous phase if its atomic or molecular dispersion is uniform; e.g., a glass of water containing dissolved salt, sugar, and a dye constitutes only a single liquid phase. If hundreds of grains of sand were added, all the grains together would constitute only a single additional (solid) phase. The different phases of a pure substance bear a fixed relationship to one another in terms of temperature and pressure. Thus, if the pressure on some liquids is raised, they will freeze at a higher temperature. This relationship is extremely important in industrial as well as scientific work