Gay-Lsac, Joseph Louis (1778-1850)

Contents:

• JOSEPH LOUIS GAY-LSAC
• JOSEPH-LOUIS GAY-LSAC
• GAY-LSAC, JOSEPH LOUIS (1778–1850)
• GAY-LSAC EQUATN
• GAY-LSAC

JOSEPH LOUIS GAY-LSAC

Yeast Are Microanisms In 1815 the French chemist Joseph-Louis Gay-Lsac ma some tertg observatns about yeast. Gay-Lsac was experimentg wh a method veloped by Nilas Appert, a nfectner and oker, for preventg perishable food om rottg. Gay-Lsac was terted g the method to mata grape juice wort an unfermented state for an fe time.

Durg alholic fermentatn, Saccharomyc nverts grape sugars to alhol and rbon dxi as per the Gay-Lsac equatn where 1 mole sugar yields 2 mol each of ethanol and rbon dxi (Fig. This also mak him the first person to postulate that the prciple of the nservatn of mass also applied chemil reactns: “We have to assume that there is a te balance or equatn between the elements of the pounds wh which we start and those obtaed at the end of the reactn” 1815, Gay-Lsac revised the balance of Lavoisier’s equatn, leadg to the rrect empiril equatn for fermentatn the late C20th, which is still known as the Gay-Lsac equatn today. Gay-Lsac was not the only scientist to ntue Lavoisier’s work, and 1858 Morz Trbe published Theorie r Fermentwirkungen, which was based on experimental evince and fally suggted that fermentatn self was a livg procs.

In 1810 Joseph-Louis Gay-Lsac disvered that sugars om grap fermented to we (CO2 and ethyl alhol). G., France, the term alhol by volume is often replaced by gre Gay-Lsac (thanks to the French chemist Joseph Louis Gay-Losac). The two sl differ slightly: Gay-Lsac the value of 15 °C (59 °F) for temperature (stead of 20 °C).

JOSEPH-LOUIS GAY-LSAC

French chemist Joseph Louis Gay-Lsac proposed two fundamental laws of gas the early 19th century. While one is generally attributed to a fellow untryman, the other is well known as Gay-Lsac’s law. Joseph Louis Gay-Lsac (1778–1850) grew up durg both the French and Chemil Revolutns.

Gay-Lsac’s own reer as a profsor of physics and chemistry began at the Éle Polytechnique. In 1804 Gay-Lsac ma several darg ascents of over 7, 000 meters above sea level hydrogen-filled balloons—a feat not equaled for another 50 years—that allowed him to vtigate other aspects of gas. In 1808 Gay-Lsac announced what was probably his sgle greatt achievement: om his own and others’ experiments he duced that gas at nstant temperature and prsure be simple numeril proportns by volume, and the rultg product or products—if gas—also bear a simple proportn by volume to the volum of the reactants.

This ncln subsequently beme known as Gay-Lsac’s law.

GAY-LSAC, JOSEPH LOUIS (1778–1850)

Wh his fellow profsor at the Éle Polytechnique, Louis Jacqu Thénard, Gay-Lsac also participated early electrochemil rearch, vtigatg the elements disvered by s means. Featured image: Undated portra of Joseph Louis Gay-Lsac. Joseph-Louis Gay-Lsac, (born December 6, 1778, Sat-Léonard--Noblat, France—died May 9, 1850, Paris), French chemist and physicist who pneered vtigatns to the behavur of gas, tablished new techniqu for analysis, and ma notable advanc applied chemistry.

GAY-LSAC EQUATN

Gay-Lsac was the elst son of a provcial lawyer and royal official who lost his posn wh the French Revolutn of 1789. Early his schoolg, Gay-Lsac acquired an tert science, and his mathematil abily enabled him to pass the entrance examatn for the newly found Éle Polytechnique, where stunts’ expens were paid by the state.

Gay-Lsac proved to be an exemplary stunt durg his studi there om 1797 to 1800. The society’s first volume of memoirs, published 1807, clud ntributns om Gay-Lsac.

GAY-LSAC

At Arcueil, Berthollet was joed by the ement mathematician Pierre-Simon Laplace, who engaged Gay-Lsac experiments on pillary orr to study short-range forc.

Gay-Lsac’s first publitn (1802), however, was on the thermal expansn of gas.