Physical Chemistry Chapter 7 The phase rule When a reaction takes place CaCO3(s)+ CaO(s)+ CO2( g) Phase 1 Phase 2 Phase 3 a two-component system Cao co CaO+CO2→CaCO3 The number of constituent* the number of component6 The Phase Rule When a reaction takes place, CaCO3 (s)  CaO(s) + CO2 (g) Phase 1 a two-component system CaO CO2 Phase 2 Phase 3 CaO + CO2 → CaCO3 Physical Chemistry Chapter 7 The number of constituent  the number of component