Tm. Letcher et Pu. Govender, EXCESS MOLAR ENTHALPIES OF AN ALKANOL PLUS A BRANCHED-CHAIN ETHER AT THE TEMPERATURE 298.15 K, Journal of chemical and engineering data, 40(4), 1995, pp. 997-1000
Excess molar enthalpies H-m(E) measured at 298.15 K in a flow calorime
ter are reported for 12 mixtures of methanol or ethanol or propan-1-ol
or propan-2-ol + bis(1-methylethyl) ether (IPE) or 1,1-dimethylethyl
methyl ether (TBME) or 1,1-dimethylpropyl methyl ether (TAME). For all
of the systems investigated, except the methanol mixtures, H-m(E) is
positive over the whole mole fraction range and increases in the order
methanol < ethanol < propan-1-ol < propan-2-ol. Small exothermic H-m(
E) values are obtained for methanol + bis(1-methylethyl) ether or 1,1-
dimethylethyl methyl ether or 1,1-dimethylpropyl methyl ether at high
methanol mole fractions. The results are explained in terms of the str
ong self-association of the alkanol and the cross-association of the e
ther oxygen and the hydroxyl alcohol group.