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.

JOSEPH-LOUIS GAY-LSAC

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).

GAY-LSAC, JOSEPH LOUIS (1778–1850)

The two sl differ slightly: Gay-Lsac the value of 15 °C (59 °F) for temperature (stead of 20 °C). 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.

GAY-LSAC EQUATN

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

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 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.