Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

The densities of the ternary systems {methyltrioctylammonium bis(trifluoromethylsulfonyl)imide + ethanol + methyl acetate, or ethyl acetate} have been measured at the T = (298.15, 303.15, and 313.15) K. The ionic liquid (IL) methyltrioctylammonium bis(trifluoromethylsulfonyl)imide ([MOA]+[Tf2N]-) was used. The ternary excess molar volumes, VE123, were calculated from the experimental densities at each temperature. The VE123 values are negative for all mole fractions of the IL. For the system {[MOA]+[Tf2N]- + ethanol + methyl acetate}, the minimum ternary excess molar volume, VE123min, decreases with decreasing z values (increasing mole fraction of IL) except at z = 0.10 at T = 298.15 K. The VE123min decreases with an increase in the temperature except at z = 4.00 at T = 303.15 K. For the system {[MOA]+[Tf2N]- + ethanol + ethyl acetate} VE123min increases with decreasing z values at each temperature. The VE123min decreases with an increase in the temperature except at z = 0.40 at T = 313.15 K and at z = 0.08 at T = (303.15 and 313.15) K where it increases. The Cibulka equation was used to correlate the ternary VE123 data using the Redlich Kister parameters obtained from fitting the Redlich Kister equation to the five binary systems obtained from literature.