Raoult, François Marie

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Raoult, François Marie

(fräNswä` märē` räo͞olz`), 1830–1901, French physicist and chemist. He was professor (from 1870) and dean (from 1889) of the faculty of sciences at the Univ. of Grenoble. He is know especially for his work on solutions, which led to his formulation of Raoult's lawRaoult's law
[for F. M. Raoult, a French physicist and chemist] states that the addition of solute to a liquid lessens the tendency for the liquid to become a solid or a gas, i.e., reduces the freezing point and the vapor pressure (see solution).
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Raoult, François Marie

 

Born May 10, 1830, in Fournes-en-Veppes, department of Nord; died Apr. 1, 1901, in Grenoble. French chemist and physicist. Corresponding member of the Académie des Sciences in Paris (1890).

Beginning in 1867, Raoult worked at the University of Grenoble, where he became a professor in 1870. He was a corresponding member of the St. Petersburg Academy of Sciences (1899). In the period 1882–88, while investigating the freezing-point and vapor-pressure lowerings and elevation of the boiling point of a solvent in a solution, Raoult discovered what came to be known as Raoult’s laws. These laws are used to determine the molecular weights of substances in the dissolved state.

WORKS

Tonométrie. Paris, 1900.
Cryoscopie. Paris, 1901.