版权所有：华东理工大学物理化学教研室 16 1). One-component systems Both p and T can be varied i n d e p e n d e n t l y w i t h o u t changing the number of phases. In other words, a single phase is represented by an area on a phase diagram. 8.2 The phase rule The typical regions of a one-component phase diagram. If only one phase is present, F = 1-1+2=2 For a one-component system:版权所有：华东理工大学物理化学教研室 16 1). One-component systems Both p and T can be varied i n d e p e n d e n t l y w i t h o u t changing the number of phases. In other words, a single phase is represented by an area on a phase diagram. 8.2 The phase rule The typical regions of a one-component phase diagram. If only one phase is present, F = 1-1+2=2 For a one-component system: