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

摘要

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.