版权所有：华东理工大学物理化学教研室 13 8.1 Definitions 3). Degrees of freedom, F If two phases are in equilibrium in a single￾component system(C = 1, P = 2), T (or p) can be changed at will, but the change in T (or p) demands an accompanying change in p (or T) to preserve the number of phases in equilibrium. That is, the variance of the system has fallen to F=1.版权所有：华东理工大学物理化学教研室 13 8.1 Definitions 3). Degrees of freedom, F If two phases are in equilibrium in a single￾component system(C = 1, P = 2), T (or p) can be changed at will, but the change in T (or p) demands an accompanying change in p (or T) to preserve the number of phases in equilibrium. That is, the variance of the system has fallen to F=1