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]+[Tf2N]−) was used. The ternary excess molar volumes, V123E, were calculated from the experimental densities at each temperature. The V123E values are negative for all mole fractions of the IL. For the system {[MOA]+[Tf2N]− + ethanol + methyl acetate}, the minimum ternary excess molar volume, V123minE, decreases with decreasing z values (increasing mole fraction of IL) except at z = 0.10 at T = 298.15 K. The V123minE 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} V123minE increases with decreasing z   values at each temperature. The V123minE 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 V123E data using the Redlich–Kister parameters obtained from fitting the Redlich–Kister equation to the five binary systems obtained from literature.