JAMB - Physics (2010 - No. 15)
A vapor is said to be saturated when?
a dynamic equilibrium exists between liquid molecules and the vapour molecules
a dynamic equilibrium exists such that more molecules return to the liquid than are leaving it
the temperature of the vapour varies
the vapour pressure is atmospheric
Paliwanag
A saturated vapour is one which is in dynamic equilibrium with its own liquid; that is as many go from the liquid to the vapour state every second return back to liquid.