Chemistry - Surface Chemistry Question with Solution | TestHub

Adsorption is exothermic process due to decrease in surface energy. Micelle formation is endothermic, it is due to For any spontaneous process entropy should always increase, hence, $\mathrm{\Delta S}>0$ for micelle formation and micelle formation decreases the stability of the colloidal solution so, energy of the mixture should increase which means $\mathrm{\Delta H}>0$.

The adsorption process $∆\mathrm{H}=–\mathrm{ve}$. For micelle formation $∆\mathrm{H}$ is $+\mathrm{ve}$ and $∆\mathrm{S}$ is $+\mathrm{ve}$.