Viscosities and ultrasonic speeds of binary mixtures of benzene with triethylamine and tributylamine at different temperatures:An experimental and theoretical study  

作　　者：Anwar Ali Firdosa Nabi Dinesh Chand Anil Kumar Nain Nizamul Haque Ansari 

机构地区：[1]Department of Chemistry,Jamia Millia Islamia(Central University)New Delhi 110025 India [2]Department of Chemistry,Jamia Millia Islamia(Central University) New Delhi 110025 India [3]Department of Chemistry,Amity School of Engineering,Super Expressway Noida-201301,U.P.,India [4]Department of Chemistry,Dayal Singh College,Delhi University New Delhi 110003 India

出　　处：《Chinese Journal of Acoustics》2009年第3期193-208,共16页声学学报（英文版）

摘　　要：The viscosities, η, and ultrasonic speeds, u, of pure benzene, triethylamine, （TEA） tributylamine, （TBA）, and those of their binary mixtures, with benzene as common component, covering the whole composition range have been measured at 278.15 K, 283.15 K, 288.15 K, 293.15 K, 298.15 K, 303.15 K, 308.15 K, 313.15 K, and 318.15 K. From the experimental data the deviations in viscosity, △η, deviations in Gibbs free energy, AG, deviations in ultrasonic speed, △u, deviations in entropies, △S^＊, and deviations in enthalpies, △H^＊, of activation of viscous flow have been determined. The sign and magnitude of these parameters were found to be sensitive towards interactions prevailing in the studied systems. Further, the excess molar volumes, VE, were calculated using data for the binary mixtures. Moreover, theoretical values of viscosities and ultrasonic speeds of the binary mixtures were calculated using different empirical relations and theories. The results were in experimental and theoretical values. discussed in terms of average deviations （AD）The viscosities, η, and ultrasonic speeds, u, of pure benzene, triethylamine, （TEA） tributylamine, （TBA）, and those of their binary mixtures, with benzene as common component, covering the whole composition range have been measured at 278.15 K, 283.15 K, 288.15 K, 293.15 K, 298.15 K, 303.15 K, 308.15 K, 313.15 K, and 318.15 K. From the experimental data the deviations in viscosity, △η, deviations in Gibbs free energy, AG, deviations in ultrasonic speed, △u, deviations in entropies, △S^＊, and deviations in enthalpies, △H^＊, of activation of viscous flow have been determined. The sign and magnitude of these parameters were found to be sensitive towards interactions prevailing in the studied systems. Further, the excess molar volumes, VE, were calculated using data for the binary mixtures. Moreover, theoretical values of viscosities and ultrasonic speeds of the binary mixtures were calculated using different empirical relations and theories. The results were in experimental and theoretical values. discussed in terms of average deviations （AD）

关 键 词：Viscosities and ultrasonic speeds of binary mixtures of benzene with triethylamine and tributylamine at different temperatures 

分 类 号：O426[理学—声学]