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espanolSe determino la densidad de DL-alanina en soluciones acuosas del liquido ionico trifluorometanosulfonato de 1-Butil-3-metil imidazolio en el intervalo de temperaturas de 283.15 a 313.15 K utilizando un densimetro de tubo vibratorio Anton Paar DMA 5000. Se calcularon los volumenes molares aparentes, volumenes molares aparentes a dilucion infinita, la segunda derivada del volumen molar parcial a dilucion infinita con respecto a la temperatura, el volumen molar parcial de transferencia a dilucion infinita y los numeros de hidratacion. Se encontro que los valores de la segunda derivada del volumen molar aparente limite con temperatura son negativos a todas las concentraciones del solvente mixto. Esto indica que se favorecen las interacciones soluto-solvente y que la DL-alanina actua como un desestabilizador de la estructura del solvente EnglishDensities of DL-alanine in aqueous solutions of ionic liquid 1-butyl-3- methylimidazolium trifluoromethane- sulfonate were determined at temperatures ranging from 283.15 to 313.15 K using an Anton Paar DMA 5000 vibrating tube densitometer. The apparent molar volume, the infinite dilution apparent molar volume, the second derivative of the infinite dilution partial molar volume with respect to temperature, the partial molar volume of transfer at infinite dilution, and the number of hydration were calculated. It was found that the values of the second derivative of the limiting apparent molar volume with temperature are negative at all concentrations of the mixed solvent. This indicates that solute-solvent interactions are favored and that the DL-alanine acts as a disruptor of the structure of the solvent.

Interacciones de la DL-Alanina en Soluciones Acuosas de Trifluorometanosulfonato de 1-Butil, 3-Metilimidazolio a Diferentes Temperaturas