The effect of temperature and pressure on a liquid can be described in terms of kinetic-molecular theory. The following figure illustrates the molecular behavior of a liquid at a low temperature near its freezing point and at a higher temperature near its boiling point.
|Microscopic view of a liquid at a low temperature.||Microscopic view of a liquid at a high temperature.|
Note how temperature effects the motion of the atoms or molecules in a liquid. As the temperature of a solid, liquid or gas increases, the particles move more rapidly. As the temperature falls, the particles slow down.