The Solubility of Gases in Liquids, Henrys Law Again

The solubility parameter helps us understand and correlate the solubility ot gases in liquids. Table 9.2 summarizes the experimental solubilities of various common gases in a range of solvents, at 1.00 atm and 2S°C. The values are times 10 , so that, for example, the mol fraction of He in perfluoro-n-hexane under these conditions is x eUmn = 0.00092. 

FIGURE 9.8 The solubility of a variety of gases in a variety of solvents, at 1 atm gas pressure and 25 C. The solubility is shown multiplied by 10 , so that a 1 on the left axis corresponds to Xgas-in soiution = 10 mol fraction. The liquid solvents are those in Table 9.2, in the order from the top of the table, omitting the values for water. 

The family of perfiuorocarbons has the lowest solubility parameters of any known set of compounds and correspondingly the highest gas solubilities. 

The lower critical temperature gases have lower solubilities than the higher critical temperature gases, with some exceptions. AU of the gases shown are above their critical temperatures at 25°C, except for CO2 (Tc = 31°C) its solubility is by far the highest shown. 

and compare the resulting solubility of pure O2 at 1.00 atm and 25°C with the values shown in Table 9.2. 

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