van't Hoff's law

van't Hoff's law
van't Hoff's law vant-'hȯfs- n a statement in physical chemistry: the effect of a change in temperature on a system in equilibrium is to shift the equilibrium in the direction that acts to nullify the temperature change <according to van't Hoff's law, an increase in temperature will cause an increase in the rate of an endothermic reaction>
Van't Hoff Jacobus Henricus (1852-1911)
Dutch physical chemist. Van't Hoff is considered the father of physical chemistry. As a professor of chemistry he taught first at the University of Amsterdam and later at the Prussian Academy of Science at Berlin. In 1886 he demonstrated a similarity between the behavior of dilute solutions and gases. He also introduced the modern concept of chemical affinity. Van't Hoff was awarded the first Nobel Prize for Chemistry in 1901 for his work on rates of reaction, chemical equilibrium, and osmotic pressure.

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1. a substance in solution exerts an osmotic pressure equal to the gas pressure that it would exert if its molecules were in a gaseous state and occupied a volume equal to that of the solution under the same conditions of temperature and pressure. 2. van't Hoff rule.

Medical dictionary. 2011.

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Look at other dictionaries:

  • Van't Hoff's law — [After J. H. van t Hoff, Dutch physical chemist.] (Phys. Chem.) The generalization that: when a system is in equilibrium, of the two opposed interactions the endothermic is promoted by raising the temperature, the exothermic by lowering it.… …   The Collaborative International Dictionary of English

  • Van't Hoff's law — /vant ˈhɔfs lɔ/ (say vahnt hawfs law) noun the law which states that the osmotic pressure of a dilute solution is equal to the pressure which the solute would exert in the gaseous state, if it occupied a volume equal to the volume of the solution …  

  • van't hoff's law — ȯfs . äfs noun Usage: usually capitalized H Etymology: after Jacobus H. van t Hoff died 1911 Du. physical chemist : a statement in physical chemistry: for a system in equilibrium an increase in temperature increases the rate of the reaction… …   Useful english dictionary

  • van't Hoff's law rule — (vahnt hofsґ) [Jacobus Hendricus van t Hoff, Dutch chemist, 1852–1911; winner of the Nobel prize for chemistry in 1901] see under law and rule …   Medical dictionary

  • van't Hoff rule — the velocity of chemical reactions is increased twofold or more for each rise of 10°C in temperature; it is generally true when temperatures approximate those under which the reaction normally occurs. Called also van t Hoff s law. See also… …   Medical dictionary

  • van’t Hoff law — van’t Hofo taisyklė statusas T sritis Standartizacija ir metrologija apibrėžtis Teiginys, kuriuo teigiama, kad padidinus temperatūrą 10 laipsnių reakcijos sparta padidėja nuo 2 iki 4 kartų. atitikmenys: angl. van’t Hoff law; van’t Hoff rule vok.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • Van’t Hoff law — van’t Hofo dėsnis statusas T sritis fizika atitikmenys: angl. Van’t Hoff law vok. Van’t Hoffsche Regel, f; Van’t Hoffsches Gesetz, m rus. закон Вант Гоффа, m; правило Вант Гоффа, m pranc. loi de Van’t Hoff, f …   Fizikos terminų žodynas

  • van’t Hoff rule — van’t Hofo taisyklė statusas T sritis Standartizacija ir metrologija apibrėžtis Teiginys, kuriuo teigiama, kad padidinus temperatūrą 10 laipsnių reakcijos sparta padidėja nuo 2 iki 4 kartų. atitikmenys: angl. van’t Hoff law; van’t Hoff rule vok.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • van't Hoff law — van t Hofo taisyklė statusas T sritis chemija apibrėžtis Pakėlus temperatūrą 10 laipsnių reakcijos greitis padidėja 2–4 kartus. atitikmenys: angl. van t Hoff law; van t Hoff rule rus. правило Вант Гоффа …   Chemijos terminų aiškinamasis žodynas

  • van't Hoff rule — van t Hofo taisyklė statusas T sritis chemija apibrėžtis Pakėlus temperatūrą 10 laipsnių reakcijos greitis padidėja 2–4 kartus. atitikmenys: angl. van t Hoff law; van t Hoff rule rus. правило Вант Гоффа …   Chemijos terminų aiškinamasis žodynas

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