Onsager , Lars
(1903–1976) Norwegian–American chemist
Born at Christiania (now Oslo) in Norway, Onsager was educated at the Norwegian Institute of Technology. He moved to America in 1928 and obtained his PhD at Yale in 1935. He spent virtually his whole career at Yale, serving as J.W. Gibbs Professor of Theoretical Chemistry from 1945 until 1972.
Onsager made two important contributions to chemical theory. In 1926 he showed the need to modify the equation established by Peter Debye and Erich Hückel in 1923 which described the behavior of ions in a solution, by taking Brownian motion into consideration.
Onsager's main work, however, was in the foundation of the study of nonequilibrium thermodynamics. Here an attempt is made to apply the normal laws of thermodynamics to systems that are not in equilibrium – where there are temperature, pressure, or potential differences of some kind. For his work in this field Onsager was awarded the Nobel Prize for chemistry in 1968. The study of nonequilibrium thermodynamics was further developed by Ilya Prigogine.

Scientists. . 2011.

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  • Onsager, Lars — born Nov. 27, 1903, Oslo, Nor. died Oct. 5, 1976, Coral Gables, Fla., U.S. Norwegian born U.S. chemist. He immigrated to the U.S. and taught principally at Yale University. His development of a general theory of irreversible chemical processes,… …   Universalium

  • Onsager,Lars — On·sa·ger (ônʹsä gər), Lars. 1903 1976. Norwegian born American chemist. He won a 1968 Nobel Prize for the development of a system of equations in thermodynamics. * * * …   Universalium

  • Onsager, Lars — ► (1903 76) Químico noruego. Fue premio Nobel de Química en 1968, por el desarrollo de una teoría general de los procesos químicos irreversibles. * * * (27 nov. 1903, Oslo, Noruega–5 oct. 1976, Coral Gables, Fla., EE.UU.). Químico estadounidense… …   Enciclopedia Universal

  • Onsager — Lars …   Scientists

  • Onsager — Onsager, Lars …   Enciclopedia Universal

  • Lars Onsager — Born November 27, 1903(1903 11 27 …   Wikipedia

  • ONSAGER (L.) — ONSAGER LARS (1903 1976) Chimiste et physicien américain né à Oslo de parents norvégiens. Dès 1925, Lars Onsager obtient dans cette ville son diplôme d’ingénieur chimiste à l’École technique supérieure de Norvège. Au cours de ses études, Lars… …   Encyclopédie Universelle

  • Lars Onsager — Nacimiento 27 de noviembre de 1903 Oslo Fallecimiento …   Wikipedia Español

  • Lars Onsager — (* 27. November 1903 in Kristiania, heute Oslo; † 5. Oktober 1976 in Coral Gables (Florida) in der Nähe von Miami) war ein norwegischer Physikochemiker und theoretischer Physiker. 1968 wurde er mit dem Nobelpreis für Chemie ausgezeichnet.… …   Deutsch Wikipedia

  • Onsager — may refer to: Lars Onsager, a Norwegian–American physical chemist and theoretical physicist Onsager reciprocal relations, certain relations between flows and forces in thermodynamic systems This disambiguation page lists articles associated with… …   Wikipedia

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