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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (9): 1553-1557. 上一篇    下一篇

研究论文

水的内压与水溶液的Henry常数

郭明;黑恩成;刘国杰   

  1. 华东理工大学化学系.上海(200237)
  • 发布日期:2002-09-15

Internal Pressure of Water and Henry's Constant of Aqueous Solutions

Guo Ming;Hei Encheng;Liu Guojie   

  1. Department of Chemistry, East China University of Science and Technology.Shanghai(200237)
  • Published:2002-09-15

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被引次数

1

为使前文提出的气体溶解度的新模型能够适用于稀水溶液，由分子间作用位能 函数建立了一个水的内压方程，它能用来描述宽阔温度范围内水的内压随密度的改 变。用38种气体在水中的Henry常数实验数据对新模型检验结果表明，计算值与实 验值间的一致性是令人满意的。此外，新模型还能由溶质与溶剂和溶剂与溶剂分子 间的作用很好地解释Henry常数的大小及其随温度的变化规律。

关键词: 水, Henry常数, 内压力, 溶剂

In order to make the new model of gas solubility proposed by our previous work be applied to the dilute aqueous solutions, an internal pressure equation of water is established from the intermolecular potential function. This equation can be used to describe the variation of internal pressure of water with the density over the wide range of temperature. The new model of gas solubility is tested by the experimental data of Henry's constant for gases in the water, and the consistency between the calculated and experimental values is satisfactory. In addition, the new model can also be used to explain the dimensions of Henry's constants and their rule of change with the temperature by solute-solvent and solvent-solvent interactions.

Key words: water, Henry's constant, INTERNAL PRESSURE, SOLVENTS

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