The Soret coefficients of 0 .01 aqua-molal (ie 0.01 moles solute per 55 .55 moles solvent) solutions of I : 1 electrolytes in water, methanol, formamide. N-mcthyll'ormamide and dimethyl formatnide have been measured using the conductometric technique . Suitable thermal diffusion cells . machined fro
Medium effects in aqueous-non-electrolyte solutions
โ Scribed by Th.F. Tadros; H. Sadek
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 883 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0013-4686
No coin nor oath required. For personal study only.
โฆ Synopsis
The parameters that describe the effect of the medium on the free energy of electrolyte are discussed. From a study of the medium effezts caused by a number of weak acids that cause no appreciable change in the dielectric constant of water, it become8 evident that the main cause for the change in the media effect is the structural change (promotion of ice-like stmcture) in liquid water by the added weak acid. Evidence in support for the structural change is gained from an investigation of the in5uence of temperature on the free energy of the transfer process. R&au&-Discussion des param&res dkrivant l'effet de milieu sur l'6nergie libre des 6lectrolytes. D'une etude des effets de milieu caus& par un certain nombre d'acides faibles ne modi5ant pas apprkiablement la constante di&ctrique de l'eau, il a changement d'effet de milieu cons&e dans une traJ paraft evident que la cause principale du ormation structurale (Ctablkement d'une proazssus de transfert. structure analogue k celle de la glace) de lkau liquide ce changement structural se manifeste en &&ant %J ar l'acide faible ajout6. La vraisemblance de 1 uence de la temp&ature sur l%nergie libre du --smog-Die Parameter, welche den Eiiuss des Mediums auf die freie Jbeqie von Elektrolyten bhreiben, we&n diskutiert. Aus Untersuchungen der Eiikse eitler Rahe von schwachen SHumn, die die Dielektrizit&skonstante von Wasser nicht merklich vzr&&an, wird ersichtlich, dass der HauptelTekt dieser schwachen S&uen in einer StruktwaHn duun des5&sigen Wassers (EMhnliche Struktur) bcsteht. Weitcre Bestittigung fur diesc strukturcllen $ erHndaungen findet man bei dcr Untersuchung des Einflusses der Tcmperatur auf die f&e Energie der I)batragungsreaktion.
๐ SIMILAR VOLUMES
Abstraet--A new approach is presented for calculation of activity coefficients in multicomponent aqueous electrolyte and non-electrolyte solutions. The approach is based on an integration of the Gibbs-Duhem equation. It is shown that using standard thermodynamic properties for the pure components an
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