Excess molar enthalpies for ethanol plus 2-propanol plus methyl tert-butylether and 1-propanol plus 2-propanol plus methyl tert-butyl ether at the temperature of 298.15 K

Ternary excess molar enthalpies for the ethanol + 2-propanol + methyl tert- butyl ether (MTBE) and 1-propanol + 2-propanol + MTBE systems have been mea sured by a flow microcalorimeter at 298.15 K and ambient pressure. The pseu dobinary excess molar enthalpies are positive over the whole range of compo sition. The ternary experimental results are correlated with a polynomial e quation. The results have been compared with those calculated from a UNIQUA C associated-solution model taking into account the self-association of alc ohols as well as the solvation between unlike alcohols and alcohols with MT BE using only binary parameters.