Henry's law

Henry's law, formulated by William Henry in 1803 (Refs. 1 and 2), states that the amount of a given gas dissolved in a liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid.

Mathematically,

$p=kc\,$

where k, the constant of proportionality, is termed Henry's constant.

This constant is, of course, dependent on the dimensions employed for the pressure and the concentration. In chemistry, atm and molarity are typical. A more elegant definition is to make it dimensionless making use of the ideal gas equation of state (if applicable).

External links

• Henry's law at wikipedia

References

1. William Henry "Experiments on the Quantity of Gases Absorbed by Water, at Different Temperatures, and under Different Pressures", Philosophical Transactions of the Royal Society of London 93 pp. 29-42 (1803)
2. William Henry "Appendix: Experiments on the Quantity of Gases Absorbed by Water, at Different Temperatures, and under Different Pressures", Philosophical Transactions of the Royal Society of London 93 pp. 274-276 (1803)