Excess volume and excess enthalpy of binary mixtures composed of 1,2-dichloropropane and 1-alkanol (C5-C8)
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- 作者：Hyo-Won Sim ; Moon Gab Kim
- 关键词：Excess Molar Properties (Volumes and Enthalpies) ; Padé Approximation ; Thermodynamic Models ; 1 ; 2 ; Dichloropropane ; 1 ; Alkanols
- 刊名：Korean Journal of Chemical Engineering
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：33
- 期：1
- 页码：271-276
- 全文大小：179 KB
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Moon Gab Kim (1)
1. School of Nano & Materials Science and Engineering, Kyungpook National University, 386 Gajang-dong, Sangju, 742-711, Korea - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Industrial Chemistry and Chemical Engineering
Catalysis
Materials Science
Biotechnology - 出版者：Springer New York
- ISSN：1975-7220
文摘
The excess molar volumes and excess molar enthalpies at T=298.15 K and atmospheric pressure for the binary systems {CH3CHClCH2Cl (1)+CH3(CH2) n−1OH (2)} (n=5 to 8) have been determined over the whole range of composition from the density and heat flux measurements using a digital vibrating-tube densimeter and an isothermal calorimeter, respectively. The measured excess molar volumes of all binary mixtures showed positive symmetrical trend with values increasing with chain length of 1-alkanol. Similarly, excess enthalpy values of all binary mixtures showed skewed endothermic behavior with values increasing with chain length of 1-alkanol. The maxima of excess molar enthalpy values were observed around x1=0.65 with excess enthalpy value ranging from 1,356.8 J/mol (1-pentanol) to 1,543.4 J/mol (1-octanol). The experimental results of both H m E and V m E are fitted to a modified version of Redlich-Kister equation using the Padé approximant to correlate the composition dependence. The experimental H m E data were also fitted to three local-composition models (Wilson, NRTL, and UNIQUAC). The correlation of excess enthalpy data in these binary systems using UNIQUAC model provides the most appropriate results.