Phase diagram (Britannica)1 S.J.T.U. Phase Transformation and Applications Page 16/45 graph showing the limiting conditions for solid. liquid,and gaseous phases of a single substance or of a mixture of substances while undergoing changes in pressure and temperature or in some other combination of variables,such as solubility and temperature. 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 16/45 Phase diagram (Britannica) 1 graph showing the limiting conditions for solid, liquid, and gaseous phases of a single substance or of a mixture of substances while undergoing changes in pressure and temperature or in some other combination of variables, such as solubility and temperature