Thermal parameters associated to micellization of dodecylpyridinium bromide and chloride in aqueous solution |
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Authors: | Galán J J Gonzáles-Pérez A Del Cactillo J L Rodríguez J R |
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Institution: | (1) Facultad de Física, Departamento de Física de la Materia Condensada, Grupo de Ciencia y Tecnología de Coloides, Universidad de Santiago de Compostela, E-15706 Santiago de Compostela, Spain |
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Abstract: | Electrical conductivity of aqueous solutions of dodecylpyridinium chloride and bromide have been determined. From these data
the critical micelle concentration (cmc) was determined. The thermal properties as standard Gibbs free energy, enthalpy and entropy of micellization was estimated
from a uncharged-phase separation model and enables to obtain another properties like heat capacity of micellization and the
relevant parameters in the minimum of temperature dependence of cmc. The enthalpy-entropy compensation was shown for the studied compounds.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | temperature dependence enthalpy critical micelle concentration conductivity dodecylpyridinium chloride and bromide entropy and standard Gibbs free energy |
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