ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 51, Number 6
JKCSEZ 51(6)
December 20, 2007 

The purpose of this study is to suggest how to use the phase diagram for water to explain the evaporation
and sublimation in the atmospheric condition. In principle, the phase diagram for water represents a one component system
so it cannot be applied to the water contact with the air. When the liquid or solid phase of water exists in the air,
always water vapor also exists in the air. In this case, we cannot present this state as a single point on the phase diagram
because the pressure of the liquid or solid is different from that of the vapor in the air. However, since the saturation vapor
pressure of liquid or solid is altered by negligible amount due to the presence of air, the evaporation and sublimation
in the atmospheric condition can be explained using the vapor pressure line and sublimation line on the phase diagram.