Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12494/15766
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Title: Thermodynamic study of the solubility of ethylparaben in acetonitrile + water cosolvent mixtures at different temperatures
Author: Romero Nieto, Alba Miledy
Cerquera, Nestor Enrique
Martínez, Fleming
Delgado, Daniel Ricardo
Email autor: danielr.delgado@campusucc.edu.co
metadata.dc.description.cvlac: http://scienti.colciencias.gov.co:8081/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001402116
Issue Date: 1-Aug-2019
Keywords: Thermodynamic analysis
Cosolvent mixture
Ethylparaben
Acetonitrile
Solubility
Resume: The thermodynamic analysis of the solubility of ethylparaben (1) in acetonitrile (1) + water (2) cosolvent mixtures at 9 temperatures, 10 cosolvent mixtures and the 2 pure solvents, water and acetonitrile, is reported herein. The solution thermodynamic functions were calculated from the experimental solubility data, using the van't Hoff and Gibbs equations, following the approach proposed by Krug et al. Thus, the solubility of ethylparaben is thermo-dependent, reaching its minimum value in pure water at 278.15 K and its maximum value in the cosolvent mixture w1 = 0.90 at 318.18 K. The enthalpy of solution is positive in all cases, which is an indication of the endothermic process, with an enthalpy-driven mixing process in mixtures rich in water and by entropy mixtures rich in acetonitrile.
Abstract: The thermodynamic analysis of the solubility of ethylparaben (1) in acetonitrile (1) + water (2) cosolvent mixtures at 9 temperatures, 10 cosolvent mixtures and the 2 pure solvents, water and acetonitrile, is reported herein. The solution thermodynamic functions were calculated from the experimental solubility data, using the van't Hoff and Gibbs equations, following the approach proposed by Krug et al. Thus, the solubility of ethylparaben is thermo-dependent, reaching its minimum value in pure water at 278.15 K and its maximum value in the cosolvent mixture w1 = 0.90 at 318.18 K. The enthalpy of solution is positive in all cases, which is an indication of the endothermic process, with an enthalpy-driven mixing process in mixtures rich in water and by entropy mixtures rich in acetonitrile.
Table Of Contents: Highlights. -- Abstract. -- Keywords. -- 1. Introduction. -- 2. Experimental. -- 2.1. Reagents. -- 2.2. Preparation of the solvent mixture. -- 2.3. Determination of solubility. -- 3. Results and discussion. -- 3.1. Solubility of ethyl paraben in cosolvent mixtures of acetonitrile + water. -- 3.2. Activity coefficients of ethylparaben. -- 3.3. Thermodynamic functions of solution. -- 3.4. Thermodynamic functions of ethylparaben transfer. -- 3.5. Thermodynamic functions of the ethylparaben mixture. -- 3.6. Enthalpy–entropy compensation. -- 4. Conclusions. -- Acknowledgements. -- Declaration of competing interest. -- References.
Program: Ingeniería Industrial
Headquarters: Neiva
Type: Artículo
Citation: Alba Miledy Romero-Nieto, Nestor Enrique Cerquera, Fleming Martínez, Daniel Ricardo Delgado, Thermodynamic study of the solubility of ethylparaben in acetonitrile+ water cosolvent mixtures at different temperatures, Journal of Molecular Liquids Volume 287, 1 August 2019, 110894
Resource reference: https://www.sciencedirect.com/science/article/abs/pii/S0167732219313078
Appears in Collections:Ingeniería Industrial



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