Helmholtz free energy microemulsions

For the sake of simplicity, it will be assumed that the microemu15ion contains spherical globules of a single size. Their dispersion in the continuous phase is accompanied by an increase in the entropy of the system and the corresponding free energy change per unit volume of microemulsion is denoted by if. The Helmholtz free energy f per unit volume of microemulsion is written as the sum... 

From the point of view of traditional thermodynamics, a microemulsion is a multicomponent mixture in thermodynamic equilibrium. The change at constant temperature of the Helmholtz free energy of such a system can therefore be written as... 

The microemulsion is prepared in several steps and for each step one calculates the Helmholtz free energy F [this was chosen since the pressure inside the drop is higher by the Laplace pressure 2y/a (where a is the droplet radius) than the pressure in the medium]. 

---