Henry's law

American  

noun

Thermodynamics.

1. the principle that at a constant temperature the concentration of a gas dissolved in a fluid with which it does not combine chemically is almost directly proportional to the partial pressure of the gas at the surface of the fluid.

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Henry's law British  

noun

1. chem the principle that the amount of a gas dissolved at equilibrium in a given quantity of a liquid is proportional to the pressure of the gas in contact with the liquid

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Etymology

Origin of Henry's law

1885–90; named after William Henry (1774–1836), English chemist who devised it