Gases Henry’s law

For quite a number of gases, Henry s law holds very well when the partial pressure of the solute is less than about 100 kPa (I atm). For partial pressures of the solute gas greater than 100 kPa, H seldom is independent of the partial pressure of the solute gas, and a given value of H can be used over only a narrow range of partial pressures. There is a strongly nonlinear variation of Heniy s-law constants with temperature as discussed by Schulze and Prausnitz [2nd. Eng. Chem. Fun-dam., 20,175 (1981)]. Consultation of this reference is recommended before considering temperature extrapolations of Henry s-law data. 

For these highly water-soluble gases, Henry s law may be assumed to apply over the ambient concentration range. 

Removes soluble impurities from substrates, washing Dissolves oxygen and other atmospheric gases (Henry s Law) Serves as media for homogeneous aqueous phase reactions Serves as liquid media for heterogeneous reactions and equilibria Serves as continuous phase for dispersions and emulsions Hydrates dyestuffs in solution, as well as dye sites in fibers... 

Standard states have been chosen such that if our system behaves ideally (obey s some simple rules such as the ideal gas law for gases Henry s law, Raoult s law for solutes), the activity takes on very simple forms, and, if the system is not ideal, we introduce a fudge factor called the activity coefficient to convert the very simple form into the true activity. 

General Properties of Liquid Solutions Solutions and Colloids Degree of Solubility Solubility and Equilibrium Solubility of Gases Henry s Law... 

When a mixture of gases is brought in contact with a solvent each gas dissolves in proportion to its own partial pressure independent of the pressure of the other gases. Henry s law is applicable to each gas independently irrespective of the presence of the other gases. Thus a dissolved gas can be merely removed from the solution by bubbling in a gas of indifferent solubility. 

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