版权所有：华东理工大学物理化学教研室 9 8.1 Definitions • With chemical reactions When a reaction can occur in the system, we need to decide the minimum number of species that can be used to specify the composition of all the phases. In general: C = K-R where K is the number of constituents and R is the number of independent reactions.版权所有：华东理工大学物理化学教研室 9 8.1 Definitions • With chemical reactions When a reaction can occur in the system, we need to decide the minimum number of species that can be used to specify the composition of all the phases. In general: C = K-R where K is the number of constituents and R is the number of independent reactions