Dulong, Pierre-Louis

▪ French scientist

born Feb. 12, 1785, Rouen, Fr.
died July 18, 1838, Paris
 chemist and physicist who helped formulate the Dulong–Petit law of specific heats (1819), which proved useful in determining atomic weights.

      He was an assistant to Claude-Louis Berthollet, eventually became a professor of physics at the Polytechnical School, Paris (1820), and was appointed its director (1830). While working in chemistry he impoverished himself purchasing equipment. During investigations of the highly explosive nitrogen trichloride, which he discovered in 1813, he lost the sight in one eye and nearly lost a hand. His important research in physics was carried out with Alexis-Thérèse Petit. In 1817 they showed that Newton's law of cooling was true only for small differences in temperature. Their work on the measurement of temperature and the transfer of heat (1818) was honoured by the French Academy.

      A paper with Jöns Berzelius (1820) was concerned with fluid densities and water. With Louis-Jacques Thenard he explored the property of certain metals to facilitate combinations of gases. He also studied the refracting power of gases (1826) and the specific heat of gases (1829). He published a study with François Arago of the elasticity of steam at high temperatures (1830). His last paper (1838) described experiments determining the heat evolved in a chemical reaction.

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Universalium. 2010.

Look at other dictionaries:

  • Dulong, Pierre-Louis — ► (1785 1838) Físico francés. Estableció la ley de Dulong y Petit según la cual el producto del calor específico de una sustancia por su masa atómica es una constante …   Enciclopedia Universal

  • Dulong , Pierre-Louis — (1785–1838) French chemist and physicist. See Petit, Alexis Thérèse …   Scientists

  • Pierre-Louis Dulong — (* 12. Februar 1785 in Rouen; † 19. Juli 1838 in Paris) war ein französischer Physiker und Chemiker. Dulong besuchte die École polytechnique in Paris, an der er Physik und …   Deutsch Wikipedia

  • Pierre Louis Dulong — (* 12. Februar 1785 in Rouen; † 19. Juli 1838 in Paris) war ein französischer Mediziner, Physiker und Chemiker. Inhaltsver …   Deutsch Wikipedia

  • Pierre Louis Dulong — Saltar a navegación, búsqueda Pierre Louis Dulong Pierre Louis Dulong, Químico francés, n. en Ruán el 12 de febrero de 1785 y m. en París el 19 de julio de 1838), que encontró la relación entre el calor específ …   Wikipedia Español

  • Pierre Louis Dulong — Pour les articles homonymes, voir Dulong. Pierre Louis Dulong Naissance 13 février  …   Wikipédia en Français

  • Pierre Louis Dulong — (February 12, 1785 ndash; July 19, 1838) was a French physicist and chemist, remembered today largely for the law of Dulong and Petit. Life and work Dulong was born in Rouen, France. He worked on the specific heat capacity and the expansion and… …   Wikipedia

  • Pierre-Louis — bzw. Pierre Louis ist der Familienname folgender Personen: Joseph Nemours Pierre Louis (1900–1966), haitianische Politiker, Präsident von Haiti Michèle Pierre Louis (* 1947), haitianische Politikerin Pierre Louis bzw. Pierre Louis ist der Vorname …   Deutsch Wikipedia

  • Pierre Louis Dulong — n. (1785 1838) French chemist and physicist who formulated the Dulong Petit law in 1819 together with Alexis Petit …   English contemporary dictionary

  • Dulong — Dulong, Pierre Louis …   Enciclopedia Universal

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