Henry's law

WordReference Random House Unabridged Dictionary of American English © 2026

Hen′ry's law′, [Thermodynam.]

1. Thermodynamics 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. Cf. partial pressure.

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