Physics and Chemistry of Water
Published Online: 15 APR 2005
Copyright © 2005 by John Wiley & Sons, Inc.
How to Cite
Viadero, R. C. 2005. Henry's Law. Water Encyclopedia. 4:466–468.
- Published Online: 15 APR 2005
William Henry (1774–1836) established the fundamental relationship to define the partitioning of a soluble (or partially soluble) chemical species between gas and liquid phases, at equilibrium, in a dilute aqueous solution.
Three main limitations must be considered when applying Henry's law: (1) the state of equilibrium, (2) the solute concentration, and (3) the veracity of using standard data for calculations in contaminated water systems. The application of Henry's law is limited to cases where chemical equilibrium has been reached in a dilute solution (< 1% solute concentration). However, the concentrations of most water constituents are normally less than 1%, so the application of Henry's law is typically valid.
- Henry's law;
- Henry's law constant;
- gas solubility;
- gas–liquid equilibrium;
- partial pressure;
- ideal gas;
- fate of volatile contaminants