We want to find the solute activity coefficient g 2 as a function of composition. We can repeat the integration for each of the tabulated values of ln g 1 and obtain ln g 2 at each point. They are plotted below. For example, This can be obtained by taking the derivatives of G i for each component in the mixture and in the pure component, then taking the difference of the derivatives. The proof is straightforward, and will not be done in class.
G have the dependence on composition shown below.