Henry constant temperature dependence

Staudinger, J., Roberts, P.V. (2001) A critical compilation of Henry s law constant temperature dependence relations for organic compounds in dilute aqueous solutions. Chemosphere 44, 561-576. 

The true Henry constant strongly depends on temperature. From data listed in Gmelin (including more up to 50 °G, not listed in Table 2.83) it can be derived... 

Table 4.19 gives the Henry constants for a few common gaseous components. The chemical nature is also a dominant factor. The effect of temperature is moderate note that the solubility passes through a minimum that depends on the hydrocarbon in question and that it is around 100°C. 

Corollary 2.—The vapour pressure of the solution is equal to that of the pure solvent when c = c. Since, by Henry s law, c/c depends only on temperature, and since distillation of liquid cannot alter its composition in this case, the solution will distil unchanged at a constant temperature exactly like a pure substance. This holds only within the limits of applicability of Henry s law. 

By substituting equations for vapor pressure and solubility, the temperature dependence equation for Henry s law constant can be obtained, as demonstrated by Glew and Robertson (1956), Tsonopoulos and Wilson (1983), Heiman et al. (1985), and ten Hulscher et al. (1991). 

Reported Henry s law constants and octanol-air partition coefficients of n-pentane at various temperatures and temperature dependence equations... 

Henry s Law Constant (Pa m3/mol at 25°C or as indicated and reported temperature dependence equations. Additional data at other temperatures designated are compiled at the end of this section.) ... 

Reported Henry s law constants of benzene at various temperatures and reported temperature dependence ... 

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