Thermochemical investigation of the (phosphonic acid plus N,N-dimethylformamide) system at T = (298.15 to 328.15) K

被引：2

作者：

Manin, N. G. ^{[1
]}

Fadeeva, Y. A. ^{[1
]}

Safonova, L. P. ^{[1
]}

机构：

[1] Russian Acad Sci, GA Krestov Inst Solut Chem, 1 Akad Skaya St, Ivanovo 153045, Russia

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2016年 / 98卷

基金：

俄罗斯基础研究基金会;

关键词：

Thermochemistry; Solution enthalpy; Dilution enthalpy; N; N-dimethylformamide; Phosphonic acid; PHYSICAL PROPERTIES; CRYSTAL STRUCTURE; INFRA-RED; TEMPERATURES; SOLVATION; MIXTURES; ALKYL; IONS;

D O I：

10.1016/j.jct.2016.03.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

For the first time the solution enthalpies of crystalline phosphonic acid (H3PO3) in N, N-dimethylformamide (DMF) and dilution enthalpies of the acid solutions in DMF (H3PO3 concentrations: x(2) < 0.781 molar fraction or m < 49 mol/kg) in pure DMF have been measured at T = (298.15, 308.15, 318.15, and 328.5) K. The temperature dependence of the heat capacity of crystalline H3PO3 was obtained also for the first time. The standard solution enthalpies of H3PO3 in DMF have been calculated at different temperatures according to two different models considering the phosphonic acid either as a weak electrolyte dissociating by the first stage or as a non-electrolyte able to form dimmers. A number of thermodynamic properties have been evaluated. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：254 / 261

页数：8

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