Physicochemical Properties of Aqueous Solutions of Dimethyl- and Diethylsulfones

被引：11
|
作者：
Markaryan, Sh A. [1 ]
Aznauryan, M. G. [1 ]
Kazoyan, E. A. [1 ]
机构：
[1] Yerevan State Univ, Yerevan 0025, Armenia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2011年 / 85卷 / 12期
关键词：
dimethylsulfone; diethylsulfone; densimetry; surface tension; calorimetry; THERMODYNAMIC PROPERTIES; WATER; DIMETHYLSULFOXIDE; ENTHALPIES; SULFOXIDE; MIXTURES; SULFONE; ACID; UREA;
D O I：
10.1134/S0036024411120211
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Aqueous solutions of dimethylsulfone (DMSO2) and diethylsulfone (DESO2) are studied by means of densimetry, surface tension, and calorimetry. The solution densities are defined and the apparent and partial molar volumes of DMSO2 and DESO2 are calculated in the temperature range of 293.15-323.15 K. It is revealed that in both cases the increase of sulfone concentration leads to the reduction of the surface tension. This is more expressed in the case of DESO2 than in the extension of the sulfone hydrocarbon chain. The calorimetric studies show that the dissolution enthalpies of DMSO2 and DESO2 do not differ substantially from one another; in both cases the dissolution of crystalline sulfones makes a crucial contribution to the enthalpy of dissolution values
引用
收藏
页码：2138 / 2141
页数：4
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