Acta Phys. -Chim. Sin. ›› 1990, Vol. 6 ›› Issue (04): 485-490.doi: 10.3866/PKU.WHXB19900418

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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

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.