Ternary excess molar volumes of {methyltrioctylammonium bis(trifluoromethylsulfonyl)imide + ethanol + methyl acetate, or ethyl acetate} systems at T = (298.15, 303.15, and 313.15) K

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] +[Tf 2N] −) was used. The ternary excess molar volumes, V 123 E , were calculated from the experimental densities at each temperature. The V 123 E values are negative for all mole fractions of the IL. For the system {[MOA] +[Tf 2N] − + ethanol + methyl acetate}, the minimum ternary excess molar volume, V 123 min E , decreases with decreasing z values (increasing mole fraction of IL) except at z = 0.10 at T = 298.15 K. The V 123 min E decreases with an increase in the temperature except at z = 4.00 at T = 303.15 K. For the system {[MOA] +[Tf 2N] − + ethanol + ethyl acetate} V 123 min E increases with decreasing z values at each temperature. The V 123 min E 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 V 123 E data using the Redlich–Kister parameters obtained from fitting the Redlich–Kister equation to the five binary systems obtained from literature.