The excess molar volumes of (an alkanol + a branched chain ether) at the temperature 298.15 K and the application of the ERAS model

The excess molar volumes VmE {x(CH3OH or CH3CH2OH or CH3(CH2)2OH or CH3CH(OH)CH3 + (1 - x){CH3(CH2)2}2O or CH3C(CH3)2OCH3 or CH3CH2C(CH3)2OCH3} 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 explained in terms of the strong self-association of the alkanols, the specific interaction between the alkanol, and the ether molecules and packing effects upon mixing. The experimental Vmh results presented here, together with the previously reported data for the molar excess enthalpy HmE, has been used to test the Extended Real Associated Solution (ERAS) model.