Micelles are formed only above the Kraft temperature. We know ∆G = ∆H - T∆S (Gibbs energy relation).
For micelle formation to be spontaneous, ∆G has to be negative. This implies ∆H - T∆S has to be negative. Since spontaneity increases with temperature, this must mean that ∆S is positive. However this seems counter-intuitive because when micelles form, they come together. Shouldn't this actually decrease the entropy?