高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (2): 231.

• 论文 • 上一篇    下一篇

液体分子自扩散系数的预测

陈六平, 韩世钧   

  1. 浙江大学化学系, 杭州, 310027
  • 收稿日期:1991-02-08 出版日期:1992-02-24 发布日期:1992-02-24
  • 通讯作者: 韩世钧
  • 基金资助:

    国家自然科学基金

Prediction of Self-diffusion Coefficients of Molecules in Liquids

CHEN Liu-ping, HAN Shi-jun   

  1. Department of Chemistry, Zhe Jiang University, Hangzhou, 310027
  • Received:1991-02-08 Online:1992-02-24 Published:1992-02-24

摘要: 基于液体层膜结构模型提出预测液体分子自扩散系数的方程,对24种液体在较宽温度范围内作了检验,平均偏差为3.8%。同时分析了层膜结构模型中位形参数ξ随温度和物质不同而变化的规律,这对了解液体的微观结构、扩散过程的机理和阐明层膜结构模型的合理性具有重要意义。

关键词: 自扩散系数, 液体, 层膜结构模型

Abstract: On the basis of the layer structure model of liquid, this paper presents an equation for predicting the self-diffusion coefficients of molecules in liquidsThe equation has been tested with 24 liquids in a wide temperature range, with an average deviation of 38% The values of the configuration parameter ξ which varies with the variation of temperatures and different substances were analyzedThis is of great importance for understanding the microstructure of the liquid and the mechanism of the diffusion processes, and for expounding the rationality of the layer structure model.

Key words: Self-diffusion coefficients, Liquids, Layer structure model

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