化学学报 ›› 1993, Vol. 51 ›› Issue (6): 521-526.    下一篇

研究论文

扩散系数与内压

史济斌;刘国杰   

  1. 华东化工学院化学系
  • 发布日期:1993-06-15

Diffusion coefficient and internal pressure

SHI JIBIN;LIU GUOJIE   

  • Published:1993-06-15

本文将Eyring的液体粘性流动分子模型推广到了液体混合物,并用热力学方法导出一个无限稀释溶液中溶质的的放散系数与溶剂内压间的关系式.推导表明,扩散所需的空穴大小适为一个溶质分子所占液体的体积.扩散的活化能不仅取决于溶剂对溶质分子的作用能,而且还与在溶剂中形成空穴的难易程度有关.

关键词: 扩散系数, 活化能, 粘度, 分子模型, 粘性流动, 粘度系数, 内压, 溶液论, 热力学方法

The Eyring model of viscous flow in liqs. was extended to mixtures A relation was derived between the diffusion coefficient and the internal pressure of solvents (for infinitely diluted solns.) using a thermodn. method. The size of the hole required for diffusion equals the solute-mol. vol.; the diffusion activation energy depends on the solute-solvent interaction and on the creation of the hole.I

Key words: DIFFUSION COEFFICIENTS, ACTIVATION ENERGY, VISCOSITY, MOLECULAR MODEL, VISCOUS FLOW, VISCOSITY COEFFICIENT, INTRINSIC PRESSURE

中图分类号: