二甲亚砜+二甲苯异构体的过量体积和表面张力  

Excess Molar Volumes and Surface Tensions of Dimethyl Sulfoxide with Xylene at 298.15K

作　　者：潘传荣[1] 郑秀环[1] 欧阳钢锋[1] 杨洋溢[1] 黄钟奇[1] 

机构地区：[1]中山大学化学与化学工程学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2005年第3期46-49,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家973科技攻关计划资助项目(G2000026302)

摘　　要：在298 15K下,用振动管密度计在全浓度范围内测量了二甲亚砜分别与邻二甲苯、间二甲苯、对二甲苯构成的3个二元液体混合物的密度且计算出过量摩尔体积VE;并用悬滴法测量了此3个二元液体混合物的表面张力,且计算了这3个体系的表面张力偏差值。其中,3个二元混合物VE和表面张力偏差值均为负值,在极小值处。Densities for binary mixtures of (dimethyl sulfoxide + o_xylene,dimethyl sulfoxide + m_xylene, dimethyl sulfoxide + p_xylene) were determined using a vibrating tube densimeter over the entire concentration range at 298.15 K, and excess molar volumes were derived. Surface tensions of these binary mixtures were measured at 298.15 K by the pendant drop method, and the values of the surface tension deviation for these mixtures were also calculated. The values of excess molar volumes or surface tension deviations at 298.15 K are all negative for these three couple binary mixtures.

关 键 词：表面张力 密度 二甲苯 二甲亚砜 

分 类 号：O642.42[理学—物理化学]