期刊论文

Hou Hai-Yun

中文

高等学校化学学报

0251-0790

2009

30

3

563-567

10.3321/j.issn:0251-0790.2009.03.026

国家自然科学基金（批准号:20673080）； 西安工程大学科研启动基金（批准号:BS0704）资助；

本校为其他机构

利用Anton Paar DMA4500振动管密度计, 测量了293.15 K时二元体系C_6H_6-DMF(苯-N,N-二甲基甲酰胺)溶液的密度, 利用最小二乘法确立了溶液密度与组成的函数关系. 利用密度数据分别计算了二元体系中C_6H_6和DMF的表观摩尔体积, 并利用非线性最小二乘拟合法, 分别拟合得到了优化的C_6H_6和DMF的表观摩尔体积和摩尔分数的函数关系, 以及C_6H_6和DMF的表观摩尔体积和质量分数的函数关系. 通过对函数关系的极限运算得到了C_6H_6和DMF的标准偏摩尔体积和摩尔体积. 此外, 还计算了不同组分下体系的超额摩尔体积, 数据可用四参数Redlich-Kister方程很好地关联拟合, 得到方程系数及体系的超额摩尔体积极值...

The densities of binary solution C6H6-DMF （benzene-N,N-dimethylformamide） at 293.15 K were measured by use of the Anton Paar vibrating-tube ：densimeter, the molar fractions of benzene for the binary solution is from 0 to 1. The apparent molar volumes of C6H6 and DMF in the binary system C6H6-DMF were separately calculated from the density data, and the optimized dependences between apparent molar volumes and molar fractions and mass fractions were also determined, respectively, by the nonlinear least-square Re- gression, and further more, th...