ABSTRACT

The density (d) and speed of sound (u) for the binary systems were measured at 298.15, 303.15,308.15, and 313.15 K under atmospheric pressure. The binary systems contained the ionic liquid (IL):methyltrioctylammoniumbis(trifluoromethylsulfonyl)imide ([MOA]+[Tf2N].). The binary systems were([MOA]+[Tf2N].+ ethyl acetate or ethanol). The apparent molar volume, V., and the apparent molar isen-tropic compressibility, k., have been evaluated from the experimental density and speed of sound data,respectively. A Redlich.Mayer equation was fitted to the apparent molar volume and apparent molarisentropic compressibility data. The partial molar volume, V0., and partial molar isentropic compressibil-ity, k0., of the binary mixtures have also been calculated at each temperature. The partial molar volumeindicates that the intermolecular interactions for (IL + ethanol) are stronger than for (IL + ethyl acetate)at all temperatures and V0.for both systems increases with an increase in temperature. The values of theinfinite dilution apparent molar expansibility, E0., decreases with an increase in temperature. The isen-tropic compressibilities, ks, increases with an increase in temperature for both binary systems. Positivek0., for both binary systems can be attributed to the predominance of solvent intrinsic compressibilityover the solute intrinsic effect.

Compounds

#	Formula	Name
1	C27H54F6N2O4S2	methyltrioctylammonium 1,1,1-trifluoro-N-[(trifluoromethyl)sulfonyl]methanesulfonamide
2	C4H8O2	ethyl acetate
3	C2H6O	ethanol

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	4
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	4
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	4
POMD	3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	4
POMD	2 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	48
POMD	2 1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	48
POMD	3 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	40
POMD	3 1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	40

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Apparent molar volume and apparent molar isentropic compressibility for thebinary systems {methyltrioctylammoniumbis(trifluoromethylsulfonyl)imide + ethyl acetate or ethanol} at different temperatures underatmospheric pressure

Bahadur, I.[Indra], Deenadayalu, N.[Nirmala]

ABSTRACT