One Component System-Water System

$\underline{Phases}$

The water system consistes of three phases-

ICE(S) WATER(L) WATERVAPOUR (g)

Since H2O is the only chemical compound involved.

Therefore it is single or one component system.

From phase rule, when c=1;

$F=c-p+2=1-P+2=3-P$

ie the degree of freedom depends on the number of phase present …