Some Aspects of the Solubility of Gases in Liquids

Summary.

 Henry’s law constants may usually be used to calculate solubilities of gases at low pressures. If experimental measurements are unavailable values of Henry’s law constants may be estimated by various methods. Several of these methods depend upon quantitative structure-property relationships. A method developed by Hine and Mookerjee depends on the assumption that each bond of a particular type makes approximately the same contribution to the molar free energy change when different organic gases are dissolved in water. The solubility of gases and also the rate at which gases dissolve in cloud droplets is important for the understanding of processes which occur in the atmosphere. A simple model for the uptake of gases by water is based on an analogy with the behaviour of an electric circuit containing resistances in series and in parallel. This model is important for the interpretation of experimental measurements of rates of gas uptake.