Viscosity and Density for Binary Mixtures of Carbon Tetrachloride + Chloroform, Carbon Tetrachloride + Dichloromethane, and Chloroform + Dichloromethane and One Ternary Mixture of Chloroform + 1:1 (Carbon Tetrachloride + Dichloromethane) at 303.15 K

摘要

Viscosity and density have been measured for three binary mixtures of chlorinated methanes, that is, carbon tetrachloride + chloroform, carbon tetrachloride + dichloromethane, and chloroform + dichlo-romethane, and for one ternary mixture of 1:1 mole ratio (carbon tetrachloride + dichloromethane) + chloroform at 303.15 K. Molar excess volumes V~E and viscosity deviations were obtained for these mixtures. Molecular interactions have been interpreted from the results. There are very weak specific interactions between CCl_4 and CH_2Cl_2 or between CCl_4 and CHCl_3. There are relatively stronger specific interactions between CHCl_3 and CH_2Cl_2. The interactions betten different chlorinated methanes decrease in the order CH_2Cl_2 --- CHCl_3 > CCl_4 --- CH_2Cl_2 > CCl_4 --- CHCl_3. The interactions are considered to be caused mainly by the differences in polarity, size, and shape between different component molecules.