期刊
THERMOCHIMICA ACTA
卷 537, 期 -, 页码 57-64出版社
ELSEVIER
DOI: 10.1016/j.tca.2012.03.001
关键词
Viscosity; Excess Gibbs energy of activation; Interaction parameters; Molecular interaction
资金
- University Grant Commission, New Delhi [33-34/2007 (SR)]
The viscosity (eta) of formamide (FA) with 2-methoxyethanol (2-ME) and 2-ethoxyethanol (2-EE) has been measured at 303.15, 308.15, 313.15, 318.15 and 323.15K over the entire composition range. From the experimental viscosity data, viscosity deviations (Delta eta) of binary mixtures were evaluated and fitted to the Redlich-Kister equation. The Delta eta values are positive over the entire range of composition for (formamide + 2-methoxyethanol) and (formamide + 2-ethoxyethanol) systems. The Grunberg-Nissan (d(12)). Tamura-Kurata (T-12) and Hind (H-12) interaction parameters have been calculated. Furthermore. Gibbs free energy of activation (Delta G*), enthalpy of activation (Delta H*), entropy of activation (Delta S*) and excess Gibbs free energy of activation (Delta G*(E))of viscous flow have also been evaluated by using Eyring viscosity equation. The results are discussed in terms of molecular interactions due to physical, chemical and structural effects between the unlike molecules. It is observed that the strength of intermolecular interaction between FA and 2-alkoxyethanol molecules is in order: FA + 2-EE > FA + 2-ME. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据