Solubility of gases in liquids

The solubility of a gas in a liquid depends on temperature, the partial pressure of the gas over the liquid, the nature of the solvent and the nature of the gas. The most common solvent is water. Carbonated beverages are an example of Henry's law in everyday life. The solubility of gases depends on the pressure: an increase in pressure increases solubility, whereas a decrease in pressure decreases solubility. This statement is formalized in Henry's Law, which states that the solubility of a gas in a liquid is directly proportional to the pressure of that gas above the surface of the solution. This can be expressed in the equation


Gas solubility and its relationship to temperature can be considered in terms of kinetic molecular theory.

Gases dissolved in water become less soluble as temperature increases, while gases dissolved in organic solvents become more soluble as temperature increases.

The survival of some fish is dependent upon the increased solubility of oxygen in cooler water.