物理化学学报 >> 1990, Vol. 6 >> Issue (04): 485-490.doi: 10.3866/PKU.WHXB19900418

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某些非极性和极性溶质在苯和甲醇及二者混合物中的偏摩尔体积V0, 298.15 K

刘瑞麟; 方基业; 丁辉文; 倪朝烁; 李芝芬; 郑国康   

  1. 北京大学物理化学研究所；兰州大学化学系
  • 收稿日期:1988-12-24 修回日期:1989-02-22 发布日期:1990-08-15
  • 通讯作者: 刘瑞麟

Partial Molal Volumes of some Nonpolar and Polar Solutes in Benzene, Methanol and Their Mixtures

Liu Rui-Lin; Fang Ji-Ye; Ding Hui-Wen; Ni Chao-Shuo; Li Zhi-Fen; Zheng Guo-Kang   

  1. Institute of Physical Chemistry, Peking University; Department of Chemistry, Lanzhou University
  • Received:1988-12-24 Revised:1989-02-22 Published:1990-08-15
  • Contact: Liu Rui-Lin

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摘要： 密度法测定了298.15 K下乙醇、环己烷、三氯甲烷、甲苯、丙酮、四氯化碳、乙腈、二甲基甲酰胺、二甲基亚砜在甲醇或苯及两者混合物中的无限稀释偏摩尔体积. 密度测定所用溶液中溶质的浓度范围是0.2一1.5 m; 甲醇和苯混合物是全组成比范围. 溶质偏摩尔体积随甲醇-苯组成比的变化趋势反映了几种分子间相互作用结果即三种分子间物理型分子间相互作用; 溶质与甲醇分子氢键缔合相互作用; 溶质同甲醇或苯的弱络合作用。

Abstract: Partial molal volumes of ethanol, cyclohaxane, trichloromethane, toluene, acetone, carbon tetrachloride, acetonitrile, DMF, and DMSO in methanol, benzene, and their mixtures at infinite dilution at 298.15 K were determined with density measurement. The concentration of solutes for density measurement is in the range from 0.2 to 1.5 mol·kg~(-1) solvent. The compositions of methanol-benzene mixture lay between mole fraction 0 and 1. Variation of solute partial molal volumes with composition of methanol-benzene mixture was attributed to several aspects of molecular interaction, i.e. physical type interaction among three kinds of molecules; hydrogen bond asociation between solute and methanol molecules; and weak complex between solute and methanol or benzene.