Free energy wise, the transfer of small hydrocarbons (such as C6H6) into water is unfavorable. This mainly arises from (a) an enthalpy decrease due to hydrogen bonds between water and benzene molecules. (b) an entropy decease with water molecules taking a more ordered structure around a transferred C6H6 molecule. (c) an entropy increase with water molecules taking a less ordered structure around a transferred C6H6 molecule.