Measurement and modelling of static dielectric constants of aqueous solutions of methanol,ethanol and acetic acid at T = 293.15 K and 91.3 kPa |
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| Institution: | 1. Thermodynamics Research Laboratory, University of Kashan, Kashan, Iran;2. Division of Chemistry and Chemical Engineering, Caltech, Pasadena, CA, USA;1. Process Design and Development, Small Molecule Design and Development, Eli Lilly and Company, Lilly Technology Center South, Indianapolis, IN 46221, USA;2. Product Design and Developability, Small Molecule Design and Development, Eli Lilly and Company, Lilly Technology Center North, Indianapolis, IN 46221, USA;3. Statistics – Discovery & Development, Eli Lilly and Company, Lilly Technology Center South, Indianapolis, IN 46221, USA;1. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, P.O. Box 2711, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100039, China;1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China;2. National Paper Products Quality Supervision Inspection Center, Dongguan, China |
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| Abstract: | Static dielectric constants of aqueous solutions of methanol, ethanol and acetic acid at T = 293.15 K and 91.3 kPa were measured at weak electromagnetic field (≪0.001 V) and (≪60 Hz). The static dielectric measurements have been achieved by using the new set up presented in the previous work based on a low-pass filter. From the experimental data, excess dielectric constants, ɛE have been calculated and reported. An empirical polynomial equation was used for correlating the data of the dielectric constants for the aqueous solutions. In addition, the measured static dielectric constants data have been calculated on the basis of the empirical modification of the Kirkwood theory for multicomponent systems. According to the average absolute deviations obtained between experimental and calculated data, the calculated dielectric constants of aqueous solutions studied in this work are generally in good agreement with the experimental data. |
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