EXCESS-ENTHALPIES OF (A BROMOCHLOROALKANE PLUS TETRACHLOROMETHANE OR BENZENE) AT THE TEMPERATURE 298.15 K

The excess molar enthalpies H-m(E)[x{BrCH2Cl or BrCH2CH2Cl or BrCH2CH2CH2Cl or BrCH2(CH2)(2)CH2Cl} + (1 - x)(CCl4 or C6H6)] have been measured at the temperature 298.15 K. Mixing was endothermic at all mole fractions except for [x{BrCH2Cl or BrCH2CH2CH2Cl or BrCH2(CH2)(2)CH2Cl} + (1 - x)C6H6]. The so-called ''proximity effect'' exists between the two halogen atoms of each of the bromochloroalkanes studied. When we compare the influence of the second component of the mixture, it can be concluded that a specific interaction Br-C6H6 or Cl-C6H6 is stronger than Br-CCl4 or Cl-CCl4.