【摘要】 使用石英振荡管密度计精确测定了293.15 K-303.15 K温度范围内不同浓度的甘露醇-正丁醇-水溶液的密度.计算了甘露醇的表观摩尔体积VΦ和极限偏摩尔体积VθΦ,得到了其由纯水溶剂转移至混合溶剂中的迁移偏摩尔体积ΔtrsVθΦ.同时,测定了298.15 K温度下此三元体系的折射率nD,并求算了摩尔折射率RD.最后,从溶质-溶剂分子间相互作用出发对体积性质和摩尔折射率的变化规律进行了讨论.更多还原

【Abstract】 Apparent molar volumes(VΦ) of mannitol in aqueous solutions of 1-butanol were obtained from densities of the ternary solutions,accurately measured with a quartz vibrating-tube densimeter at several temperatures in the range from 293.15 K to 313.15 K.These data have been used to deduce limiting partial molar volumes of mannitol(VθΦ) and limiting partial molar volumes of transfer(ΔtrsVθΦ) from water to 1-butanol at different concentrations.Refractive indexes(nD) measurements were also made for the mannito-butanol-water systems at 298.15 K.From the values of nD,molar refractive indexes(RD) were calculated.Finally,the changes of the volumetric properties and molar refractive indexes were discussed in the light of interaction between solute and solvent.更多还原