EXCESS MOLAR ENTHALPIES OF (ALPHA,OMEGA-DICHLOROALKANE PLUS PENTANOL,OR HEXANOL) AT T = 298.15 K

We have determined the excess molar enthalpies H-m(E) of binary mixtur es containing an alpha,omega-dichloroalkane (from 1,3-dichloropropane to 1,6-dichlorohexane) and a I-alkanol (1-pentanol, or 1-hexanol) usin g a Calvet microcalorimeter at the temperature T = 298.15 K and normal atmospheric pressure. All mixtures exhibit endothermic behaviour for the whole composition range. The experimental values were compared wit h values calculated from three versions of a UNIFAC group-contribution formalism. The experimental and calculated results are discussed in t erms of molecular interactions and the proximity effect. (C) 1998 Acad emic Press.