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)hydration of the solute, B
B)the equal enthalpy of the solvent and solute
C)the highly negative enthalpy of the solution process
D)solvation of the solvent, A
E)an increase in disorder, since A-A, B-B, and A-B interactions are similar

Question

Quizplus · Accepted Answer

The formation of solution is favored when there is an increase in disorder, which is promoted by similar A-A, B-B, and A-B interactions in nonpolar organic liquids. The enthalpy of solution is small because the solute-solvent interactions are weak due to nonpolar nature, and the enthalpy of the solution process is not highly negative. There is no hydration of solute as both solvents are nonpolar. Solvation of the solvent does occur but is not the primary driving force for the formation of a solution.

When Two Nonpolar Organic Liquids Are Mixed, a Solution Forms