Regular Solutions and Henrys Law

Margulies [9] originally expressed his equation in terms of partial pressures. Expressed in terms of activities his equations are, for a regular solution. 

In the limit of zero mole fraction of solute or unit mole fraction of solvent, the condition in which Henry s law is accurate as a limiting law. Equation (16.73) becomes 

If we equate the chemical potential of the solute in the condensed phase with the chemical potential of the solute in the gas phase at equilibrium, we obtain 

ACTIVITIES, EXCESS GIBBS FUNCTIONS, STANDARD STATES FOR NONELECTROLYTES 

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