📜 Theorem, law or theory

Raoult's law

Ley de Raoult

Date
1887 · confidence high
Place
Grenoble, France
Credited to
François-Marie Raoult
Field
Matter & energy

What was discovered

From experimental observations, Raoult postulated that the partial vapor pressure of each component of an ideal liquid mixture equals the vapor pressure of the pure component multiplied by its mole fraction. The law, combined with Dalton's, became a pillar of distillation and the study of solutions.

Raoult was a professor at the University of Grenoble at that time; the source consulted does not confirm the exact city.

What it led to

  • Distillation technology
  • Study of azeotropes and activity coefficients
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Sources✓ verified 2026-09-28