Voi d'admissn - Fédératn Gay Lsac

Contents:

• ENTRETIEN , GAY LSAC
• ENTETIEN CPI GAY LSAC
• JOSEPH-LOUIS GAY-LSAC
• LA NTRIBUTN GAY-LSAC DANS L’éMERGENCE LA CHIMIE ANIQUE
• LE BôME GAY-LSAC ET THENARD : UNE LONGUE AMIé
• LOI GAY-LSAC : QU'T-CE QUE C'T ?
• PREPA GAY LSAC

ENTRETIEN , 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.

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. 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.

ENTETIEN CPI GAY LSAC

Gay-Lsac’s approach to the study of matter was nsistently volumetric rather than gravimetric, ntrast to that of his English ntemporary John Dalton.

Another example of Gay-Lsac’s fondns for volumetric rats appeared an 1810 vtigatn to the posn of vegetable substanc performed wh his iend Louis-Jacqu Thenard. In a followg solo flight, Gay-Lsac reached 7, 016 metr (more than 23, 000 feet), thereby settg a rerd for the hight balloon flight that remaed unbroken for a half-century. In 1805–06, amid the Napoleonic wars, Gay-Lsac embarked upon a European tour wh another Arcueil lleague, the Pssian explorer Alexanr von Humboldt.

JOSEPH-LOUIS GAY-LSAC

Gay-Lsac’s rearch together wh the patronage of Berthollet and the Arcueil group helped him to ga membership the prtig First Class of the Natnal Instute (later the Amy of Scienc) at an early stage his reer (1806). Three years prevly Gay-Lsac had been appoted to the junr post of répétr at the Éle Polytechnique where, 1810, he received a profsorship chemistry that clud a substantial salary. Rivalry between Gay-Lsac and Davy reached a climax over the de experiments Davy rried out durg an extraordary vis to Paris November 1813, at a time when France was at war wh Bra.

Gay-Lsac prented a much more plete study of de a long memoir prented to the Natnal Instute on Augt 1, 1814, and subsequently published the Annal chimie. In 1815 Gay-Lsac experimentally monstrated that pssic acid was simply hydrocyanic acid, a pound of rbon, hydrogen, and nrogen, and he also isolated the pound cyanogen [(CN)2 or C2N2].

Begng 1816, Gay-Lsac served as the jot edor of the Annal chimie et physique, a posn he shared wh his former Arcueil lleague François Arago. Prevly a few c trials had been rried out to timate the strength of chlore solutns bleachg, but Gay-Lsac troduced a scientific rigour to chemil quantifitn and vised important modifitns to apparat.

LA NTRIBUTN GAY-LSAC DANS L’éMERGENCE LA CHIMIE ANIQUE

The prcipl of volumetric analysis uld be tablished only through Gay-Lsac’s theoretil and practil geni but, once tablished, the analysis self uld be rried out by a junr assistant wh brief trag. Gay-Lsac published an entire seri of Instctns on subjects rangg om the timatn of potash (1818) to the nstctn of lightng nductors. In 1848 (the year of revolutns) Gay-Lsac rigned om his var appotments Paris, and he retired to a untry hoe the neighbourhood of his youth that was stocked wh his library and a private laboratory.

” In a logy livered after his ath at the Amy of Scienc, his iend, the physicist Arago, summed up Gay-Lsac’s scientific work as that of “an gen physicist and an outstandg chemist.

LE BôME GAY-LSAC ET THENARD : UNE LONGUE AMIé

Pour cette ssn 2020, 1560 ndidats ont postulé Conurs Commun CPI Chimie Gay-Lsac (1481 ndidatur en 2019, 1409 en 2018) dont 1005 ndidatur fém et 555 mascul.

Gay-Lsac’s law is a gas law which stat that the prsure exerted by a gas (of a given mass and kept at a nstant volume) vari directly wh the absolute temperature of the gas. Gay-Lsac’s law impli that the rat of the ial prsure and temperature is equal to the rat of the fal prsure and temperature for a gas of a fixed mass kept at a nstant volume. When a prsurized aerosol n (such as a odorant n or a spray-pat n) is heated, the rultg crease the prsure exerted by the gas on the ntaer (owg to Gay-Lsac’s law) n rult an explosn.

To learn more about Gay-Lsac’s law and other gas laws, such as Charl’ law, register wh BYJU’S and download the mobile applitn on your smartphone. Lors son séjour à Rome, Gay-Lsac entre en ntact avec le méc chimiste alien Domeni Lo Morrichi (1773-1836) et fa part à Berthollet sa déuverte l’aci fluorique dans l’émail s nts, L.

LOI GAY-LSAC : QU'T-CE QUE C'T ?

5 Blanc Edmond, Delhomme Léon, La vie émouvante et noble Gay-Lsac, Paris: Gthiers-Villars, 1950, 112; Jolibois Pierre, “Cérémonie mémorative du centième anniversaire la mort Gay-Lsac“, Adémie s Scienc, Notic et Disurs, Paris-Gthiers-Villars, 1957, t. Gay-Lsac, “Observatns sur cette qutn: Quelle t la quanté d’alol qui t entraînée par l’aci rbonique pendant la fermentatn du moût rais?

L’approche Gay-Lsac s phénomèn fermentatn et rpiratn t nforme à celle s prédécsrs, Lavoisier ou Fourcroy, qui voyaient dans le fonctnnement s anism une sue réactns chimiqu pl ou mos plex. Gay-Lsac, Instctn pour l’age l’alomètre centésimal et s tabl qui l’acpagnent, Paris, Collar, 1824; Mrice Crosland, Gay-Lsac, savant et bourgeois, op.

Gay-Lsac, “Dcriptn d’un nouve baromètre portatif”, Annal chimie et physique, 1816, 1, 113-119; “Dcriptn d’un thermomètre propre à diquer s maxima et s mima température”, Annal chimie et physique, 1816, 3, 90-91; “Dcriptn quelqu stments”, Annal chimie et physique, 1831, 51, 435-441.

PREPA GAY LSAC

Gay-Lsac, “Sur la nature du produ que l’on obtient en lcant la potasse avec une substance animale”, Annal chimie et physique, 1818, 8, 440-441; id., Journal pharmacie, 4, 1820, 149-151; id., “Actn la potasse sur l matièr aniqu”, Annal chimie et physique, 1829, 41, 398-402. Gay-Lsac, “Sur la baison l’aci chromique avec l’aci sulfurique, et sur la nversn l’alol en éther sulfurique, par un procédé nouve”, Annal chimie et physique, 1821, 16, 102-105. Cette métho permettra à Gay-Lsac d’apporter sa ntributn en physlogie végétale en mettant en évince la présence universelle matièr animalisé ou azoté dans l semenc, L.

55 Gay-Lsac et Thenard distguent l acis aniqu qui ntiennent pl d’oxygène que d’hydrogène; l substanc ntr (sucre, gomme, amidon, sucre la, lignx, etc. Reportant l urs chimie anique Berthelot Collège France, Bourgo dique en 1864 que l’appareil Thenard et Gay-Lsac existe toujours dans cet établissement sans préciser s’il t toujours utilisé, Bourgo, “Cours chimie anique M.