水的内压与水溶液的Henry常数

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

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 .

In order to make die 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 dimentions of Henry's constants and their rule of change with the temperature by solute-solvent and solvent-solvent interactions.