Question

For micelle formation, which of the following
statements are correct?
A. Micelle formation is an exothermic process.
B. Micelle formation is an endothermic process.
C. The entropy change is positive
D. The entropy change is negative

• A. A and D only
• B. A and C only
• C. B and D only
• D. B and C only

Answer 1

The correct option is D B and C only

Micelle formation is an endothermic process with positive entropy change.
For micelle formation, $\Delta S>0$ (hydrophobic effect) This is possible because, the decrease in entropy due to clustering is offset by increase in entropy due to desolvation of the surfactant. Also $\Delta H>0$