Question

Calculate the number of phases present in the following systems
(a) NH4Cl(s)
(b) An emulsion of oil in water.

Answer 1

Explanation:

Applying the components approach to water is simple. All species that may exist in pure water are formed, in whatever proportions actually exist, from the single substance H2O. Thus, there is only one component: C=1. The component version of the phase rule, F=2+C−P, gives the same result as the species version: F=2.