The vapor pressure of water is relatively low because it is held together through hydrogen bonds. This means that the molecules in a glass of water do not evaporate from the water very easily, as the molecules are attrac... More »

Water has a low vapor pressure due to the strong intermolecular forces between its molecules. The type of chemical bonding between water molecules is referred to as hydrogen bonding. More »

Sublimation is the scientific process in which solids are changed to gases without passing through the liquid phase. Sublimation occurs when temperatures and pressures are below the triple point. The triple point is the ... More »

The lowering of the vapor pressure of water due to the addition of solutes, such as acetone or ethanol, is an example of vapor pressure lowering. Vapor pressure is a colligative property of a solution that depends on sol... More »

The vapor pressure of water at 25 degrees Celsius is 23.8 mmHg. The formula for calculating the vapor pressure of water is P = exp (20.386 - 5132 /T) mmHg. "P" stands for the vapor pressure in mmHg and "T" stands for the... More »

An increase in atmospheric pressure raises the boiling point of a liquid by raising the vapor pressure of the water above the liquid. This increases the amount of thermal energy needed to increase the vapor pressure of t... More »

The vapor pressure of ethanol at room temperature (20 to 25 degrees Celsius) is between 45 to 55 mmHg. The vapor pressure of ethanol changes as its temperature does. More »