Van-t sentence example

  • This subject has occupied a dominant position in physico-chemical research since the investigations of van't Hoff and Arrhenius.
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  • The conception of a semi-permeable membrane, permeable to the solvent only, was used by van't Hoff as a means of applying the principles of thermodynamics to the theory of solution.
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  • The physical investigation of osmotic pressure, and its correlation by Van't Hoff with the pressure of a gas, brought forward a new aspect of the phenomena, and suggested an identity of physical modus operandi as well as of numerical value.
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  • Among societies of general utility are the Society for Public Welfare (Maatschappij tot nut van't algemeen, 1785), whose efforts have been mainly in the direction of educational reform; the Geographical Society at Amsterdam (1873); Teyler's Stichting or foundation at Haarlem (1778), and the societies for the promotion of industry (1777), and of sciences (1752) in the same town; the Institute of Languages, Geography and Ethnology of the Dutch Indies (1851), and the Indian Society at the Hague, the Royal Institute of Engineers at Delft (1848), the Association for the Encouragement of Music at Amsterdam, &c.
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  • Van't Hoff showed that the osmotic pressure P due to a number of dissolved molecules n in a volume V was the same as would be exerted by the same number of gas-molecules at the same temperature in the same volume, or that PV = ROn.
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  • The highest pressures recorded for cane-sugar are nearly three times as great as those given by van't Hoff's formula for the gas-pressure, but agree very well with the vapour-pressure theory, as modified by Callendar, provided that we substitute for V in Arrhenius's formula the actual specific volume of the solvent in the solution, and if we also assume that each molecule of sugar in solution combines with 5 molecules of water, as required by the observations on the depression of the freezing-point and the rise of the boiling-point.
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  • A formula of this type has been widely employed by van't Hoff and others to calculate heats of reaction and solution from observations of solubility and vice versa.
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  • An account of Raoult's life and work was given by Professor van't Hoff in a memorial lecture delivered before the London Chemical Society on the 26th of March 1902.
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  • Wislicenus, van't Hoff and others showed that substances having the same graphic formulae vary in properties and reactions, and consequently the formulae need modification in order to exhibit these differences.
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  • These deposits, in addition to having a high commercial importance, present certain problems which have received much attention, more particularly at the hands of van't Hoff and his collaborators, whose results are embodied in his Zur Bildung der ozeanischen Salzablagerungen, vol.
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  • Stewart, Recent Advances in Physical and Inorganic Chemistry, 1909; see also van't Hoff, Lectures on Theoretical and Physical Chemistry, vol.
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