# Repeat the calculation in Exercise 2.4.6 using the Guggenheim (1976) concept of a surface phase…

Repeat the calculation in Exercise 2.4.6 using the Guggenheim (1976) concept of a surface phase which has a finite thickness and is defined by boundaries placed inside both the bulk phases. To solve the problem, ensure first that you place the boundaries in each phase so that the surface excess of both water and oil is zero. Hence calculate the surface excess of the solute and verify that the result is the same as in Exercise 2.4.6.