Formation of Microemulsions*

ΔG_m = free energy change for microemulsion formation

ΔG₁   = free energy change due to increase in total surface area

ΔG₂ = free energy change due to interaction between droplets

ΔG₃ = free energy change due to adsorption of surfactant at the   

           oil/water interface from bulk oil or water

ΔS   = increase in entropy due to dispersion of oil as droplets