版权所有：华东理工大学物理化学教研室 4 8.1 Definitions 1). The phase A phase of a substance is a form of matter that is uniform throughout in chemical composition and physical state. (b) a dispersion, in which regions of one component are embedded in a matrix of a second component. (a) a single-phase solution, in which the composition is uniform on a micros￾copic scale.版权所有：华东理工大学物理化学教研室 4 8.1 Definitions 1). The phase A phase of a substance is a form of matter that is uniform throughout in chemical composition and physical state. (b) a dispersion, in which regions of one component are embedded in a matrix of a second component. (a) a single-phase solution, in which the composition is uniform on a micros￾copic scale