【摘要】 以尿素、甲酰胺和乙酰胺为溶质，二甲基甲酰胺和二甲基亚砜为溶剂；或以二甲基甲酰胺、二甲基亚砜为溶质，以甲酰胺为溶剂，通过测定溶液在２９８．１５Ｋ下的密度数据，求得了溶质的表观摩尔体积以及与溶质－溶质相互作用相关的体积第二维里系数．利用定标粒子理论讨论了溶质分子的几何体积、溶质－溶剂相互作用对溶质偏摩尔体积的影响，结果表明，溶质的溶剂化与溶质－溶质相互作用的体积效应呈相反的变化趋势更多还原

【Abstract】 Densities of solutions containing formamide, acetamide and urea in non aqueous polar solvents of N,N dimethylformamide(DMF) and dimethylsulfoxide(DMSO), and solutions containing DMF and DMSO in formamide solvents were measured at 298 15 K. The apparent molar volume of solutes( V φ 2) and the volumetric second virial coefficients( v 22 ) were evaluated. The cavity volumes of solute in solvents and the interaction volumes were calculated by using scaled particle theory. A negative effect of solute solvent interaction on v 22 was observed.更多还原