THE EXCESS MOLAR VOLUMES OF (AN ALKANOL PLUS A BRANCHED-CHAIN ETHER) AT THE TEMPERATURE 298.15 K AND THE APPLICATION OF THE ERAS MODEL

The excess molar volumes V-m(E) {x(CH3OH or CH3CH2OH or CH3(CH2)(2)OH or CH3CH(OH)CH3 + (1 - x)(CH3(CH2)(2)}(2)O or CH3C(CH3)(2)OCH3 or CH3C H2C(CH3)(2)OCH3} have been calculated from measured values of density over the whole composition range at the temperature 298.15 K in order to investigate OH ... O specific interactions. The results are explain ed in terms of the strong self-association of the alkanols, the specif ic interaction between the alkanol, and the ether molecules and packin g effects upon mixing. The experimental V-m(E) results presented here, together with the previously reported data for the molar excess entha lpy H-m(E), has been used to test the Extended Real Associated Solutio n (ERAS) model. (C) 1997 Elsevier Science B.V.