Interactions solutès-solvants dans les mèlanges eau-alcool tert.-butylique: V. enthalpie de dissolution des chlorures de sodium,potassium, rubidium et cesium |
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| Authors: | Yvon Pointud Jean Juillard Lèvon Avedikian Jean-Pierre Morel Michel Ducros |
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| Institution: | Laboratoire d` Etude des Interactions Solutés-Solvants, Groupe de Chimie-Physique, Université de Clermont, les Cézeaux, 63170 Aubere France;Laboratoire de Chimie, Ecole Nationale Sup?ieure des Techniques Acancées, 32, Boulevard Victor, 75015 ParisFrance |
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| Abstract: | By using a calorimetric method, solution enthalpies of sodium, potassium, rubidium and cesium chlorides in mixtures containing from 0 to 45% by weight of alcohol are obtained. Standard enthalpies and transfer enthalpies are estimated. From previous data concerning Gibbs energies of transfer from water to the same solvent mixtures, transfer entropies are calculated. Enthalpies and entropies exhibit a maximum for molar fractions of about 0.07 of organic solvent. Results are discussed in terms of enhancement of the structuration of the aqueous network. |
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