版权所有：华东理工大学物理化学教研室 2 In Chapter 6, we discussed the phase diagrams for pure substances. We shall develop their use systematically and show how they are rich summaries of empirical information about a wide range of systems. To set the stage, we introduce the famous phase rule of Gibbs, which shows the extent to which various parameters can be varied yet the equilibrium between phases preserved. With the rule established, we see how it can be used to discuss the phase diagrams that we met in the two preceding chapters. 8. Phase diagrams版权所有：华东理工大学物理化学教研室 2 In Chapter 6, we discussed the phase diagrams for pure substances. We shall develop their use systematically and show how they are rich summaries of empirical information about a wide range of systems. To set the stage, we introduce the famous phase rule of Gibbs, which shows the extent to which various parameters can be varied yet the equilibrium between phases preserved. With the rule established, we see how it can be used to discuss the phase diagrams that we met in the two preceding chapters. 8. Phase diagrams