【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。更多还原

【Abstract】 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.更多还原