Excess enthalpies of 12 binary liquid mixtures of .alpha.,.omega.-dibromoalkanes (C2, C4, C6) + benzene, toluene, ethylbenzene, or butylbenzene at 298.15 K

Abstract

Mixing enthalpy measurements are reported at 298.15 K for 12 binary liquid mixtures containing 1,2-dibromoethane, 1,4-dibromobutane, or 1,6-dibromohexane+benzene, +toluene, +ethylbenzene, or butylbenzene over the entire range of composition. The hE curves represented as a function of the mole fraction of dibromoalkaneare asymmetrical and may be positive, or negative, or S-shaped. The hE values are always smaller at low concentrations of the dibromoalkane. They change in the same regular manner with the molecular structure of the components as found previously in the case if alpha,omega-dibromoalkanes. They decrease from benzene to toluene and then increase with the number of C-atoms of the alkylbenzene.