The aggregation of nonpolar molecules or groups in water is thermodynamically due to the .

A. increased entropy of the water molecules.
B. decreased enthalpy of the system.
C. very strong van der Waals forces among the nonpolar molecules or groups.
D. increased entropy of the nonpolar molecules when they associate.

A. Increased entropy of the water molecules.

Explanation:

Entropy is the quantitative measure of disorder or randomness in a system or element. In thermodynamics, entropy or hydrophobic effect is the free energy change of water enclosing a solute. Hence the existing negative free charges enhances the effect of hydrophilicty hence the aggregation of non-polar molecules.