Charles Bernard Desormes (; 3 June 1777 – 30 August 1862) was a French

physicist A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate cau ...

and chemist. He determined the ratio of the specific heats of

gas Gas is a state of matter that has neither a fixed volume nor a fixed shape and is a compressible fluid. A ''pure gas'' is made up of individual atoms (e.g. a noble gas like neon) or molecules of either a single type of atom ( elements such as ...

es in 1819. He did this and almost all his scientific work in collaboration with his son-in-law

Nicolas Clément Nicolas Clément (12 January 1779 – 21 November 1841) was a French physicist and chemist. He was a colleague of Charles Desormes, with whom he conducted the Clément-Desormes experiment. The two chemists are also credited with determining a ...

(1779–1841). Clément and Desormes correctly determined the composition of

carbon disulfide Carbon disulfide (also spelled as carbon disulphide) is an inorganic compound with the chemical formula and structure . It is also considered as the anhydride of thiocarbonic acid. It is a colorless, flammable, neurotoxic liquid that is used as ...

(CS₂) and

carbon monoxide Carbon monoxide (chemical formula CO) is a poisonous, flammable gas that is colorless, odorless, tasteless, and slightly less dense than air. Carbon monoxide consists of one carbon atom and one oxygen atom connected by a triple bond. It is the si ...

(CO) in 1801–02. In 1806 they elucidated all the chemical reactions that take place during the production of

sulfuric acid Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid (English in the Commonwealth of Nations, Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen, ...

by the lead chamber method, as used in industrial chemistry. In 1813 they made a study of iodine and its compounds. Desormes was born in

Dijon Dijon (, ; ; in Burgundian language (Oïl), Burgundian: ''Digion'') is a city in and the Prefectures in France, prefecture of the Côte-d'Or Departments of France, department and of the Bourgogne-Franche-Comté Regions of France, region in eas ...

Côte-d'Or Côte-d'Or () is a département in the Bourgogne-Franche-Comté region of Northeastern France. In 2019, it had a population of 534,124.

. He was a student at the

École Polytechnique (, ; also known as Polytechnique or l'X ) is a ''grande école'' located in Palaiseau, France. It specializes in science and engineering and is a founding member of the Polytechnic Institute of Paris. The school was founded in 1794 by mat ...

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...

from 1794, when it opened, and subsequently worked there as a demonstrator. Désormes met Clément at the Ecole Polytechnique 1801, beginning a scientific collaboration that lasted until 1824. He left the Ecole 1804 to establish an alum refinery at

Verberie Verberie () is a Communes of France, commune in the Oise Departments of France, department in northern France. It lies southwest of Compiègne on the main road to Senlis, Oise, Senlis and Paris. The railway station is on the line from Compièg ...

Oise Oise ( ; ; ) is a department in the north of France. It is named after the river Oise. Inhabitants of the department are called ''Oisiens'' () or ''Isariens'', after the Latin name for the river, Isara. It had a population of 829,419 in 2019.< ...

, with Clément and Joseph Montgolfier, who had earlier pioneered balloon flight. Desormes was elected counsellor for Oise 1830 and in 1848 to the national assembly, in which he sat with the moderate republicans. He died in

References

External links

Farlex.com
1771 births 1862 deaths Scientists from Dijon Politicians from Dijon Moderate Republicans (France) Members of the 1848 Constituent Assembly 19th-century French chemists 19th-century French physicists École Polytechnique alumni Members of the French Academy of Sciences {{france-chemist-stub