Calculation of Gas Solubilities Using Henry Constants

An alternative is the usage of the Henry constant H,j as standard fugacity Using the Henry constant as standard fugacity, the following expression is obtained for the calculation of gas solubilities in a binary system  

Since in the case of gas solubilities normally only a small concentration range is covered in the liquid phase, simple expressions for the description of the 

17) A temperature of313.15K was chosen to be able to compare the solubilities. In practice 

The simple expressions used have to satisfy the asymmetric convention (y = 1 for xi 0,X2 1), However, one should have in mind that equations of state have 

At low pressures the fugacity coefficient also shows values close to unity, so that the following simple expression (so-called Henry s law) is obtained  

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