Thermodynamic Properties of the Benzene-Phenol Dimer in Dilute Aqueous Solution

Article abstract of DOI:10.1007/BF01150440

Precise vapor pressure-solubility measurements have been obtained for a dilute solutions of benzene and phenol in water at 15, 25, 35, and 45 deg C.All of the results are consistent with a mass action model that attributes deviations from ideal solution behavior to the formation of benzene dimers and hetero-dimers between benzene and phenol.The benzene-phenol dimer forms endothermically at 25 deg C, with a very large negative heat capacity, and a formation constant that reaches a maximum value of 0.66 l-mol^-1 at approximately 35 deg C.Thermodynamic properties of the benzene-phenol dimer are reported and compared with those of other aggregates that are believed to be stabilized primarily by hydrophobic inretactions.