“…In this paper, the excess molar Gibbs free energies of mixing G E m of (1-butanol + benzene, or [21], and their interpretation in terms of the Mecke-Kempter (MK) type association model [8] proposed by Treszczanowicz and Benson is presented. This is a continuation of our earlier work [22][23][24][25][26][27] where the excess molar volume V E m , enthalpy H E m , and Gibbs free energy G E m of (propanol + an aromatic hydrocarbon) at T ¼ 298:15 K, and V E m and H E m of an isomer of (butanol + an aromatic hydrocarbon) at T ¼ 298:15 K have been described in terms of the MK type association model. To the best of our knowledge, no VLE data have been previously reported in the literature for the present systems at T ¼ 308:15 K.…”