When two nonpolar organic liquids are mixed, a solution forms and the enthalpy of solution is quite small. Label the two organic liquids as A (solvent) and B (solute) The formation of solution is favored by .
A) the highly negative enthalpy of the solution process
B) an increase in disorder, since A- A, B- B, and A- B interactions are similar
C) solvation of the solvent, A
D) hydration of the solute, B
E) the equal enthalpy of the solvent and solute

Question

Quizplus · Accepted Answer

Nonpolar organic liquids have similar intermolecular forces, so mixing them does not require much energy. The resulting solution is more disordered than the pure liquids, which is favored by the increase in entropy. The enthalpy of solution is small, which indicates that the energy of the solvent-solute interactions is similar to that of the solvent-solvent and solute-solute interactions. Solvation of the solvent A and hydration of the solute B are not applicable in this case, as the organic liquids do not involve water.

When Two Nonpolar Organic Liquids Are Mixed, a Solution Forms