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- Miller A. Ruidiaz, Daniel R. Delgado, Fleming Martínez, DESEMPEÑO DE LOS MODELOS DE JOUYBAN & ACREE Y YALKOWSKY & ROSEMAN EN LA ESTIMACIÓN DE LA SOLUBILIDAD DE INDOMETACINA EN MEZCLAS COSOLVENTES ETANOL + AGUA , Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales: Vol. 35 Núm. 136 (2011)
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En este trabajo se calculan los volúmenes molares, molares de exceso y molares parciales a partir de valores de densidad para el sistema glicerol formal + etanol en todo el intervalo de composición a temperaturas entre 278,15 y 313,15 K. Los volúmenes molares de exceso se modelaron de acuerdo con la ecuación de Redlich-Kister y se compararon con los reportados para otros sistemas. El sistema estudiado presenta volúmenes de exceso negativos, probablemente debido a fuertes interacciones por unión de hidrógeno. También se analizó el efecto de la temperatura sobre las diferentes propiedades volumétricas estudiadas. Asimismo, se calcularon los coeficientes térmicos de expansión volumétrica. Finalmente, se utilizó el modelo Jouyban-Acree para correlacionar la densidad y el volumen molar de las diferentes mezclas, encontrando desviaciones medias relativas de 0,03 ± 0,03% y 0,17 ± 0,13% para densidades y volúmenes molares, respectivamente.
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