Micelle formation is entropically favourable. Justify or criticize.

The surface tension $()$ of a solution, prepared by mixing $0\mathrm{.}02$mol of an organic acid in $1L$ of pure water, is represented as ${}_0-=$Alog$(1+BC)$ where ${}_0$ denotes the surface tension of the pure water, $A=0\mathrm{.}03N{m}^{-1},B=50mo{l}^{-1}L$ and $C$ is concentration in $mol{L}^{-1}.$ The excess concentration of the organic acid at the liquid, determined by Gibbs adsorption equation at $300K$ is $n{10}^{-6}mol{m}^{-2}.$ Find out the value of $\text{'}n.[$Given $R=8\mathrm{.}314Jmo{l}^{-1}{K}^{-1}]$