Using the solution-reaction isoperibol calorimeter, molar enthalpies of solution in water for ionic liquid [C6mim][OAc] with different molalities were measured in the temperature range from (288.15 to 308.15 +- 0.01) K with an interval of 5 K. According to Archer's method, the values of the standard molar enthalpies of solution were obtained for [C6mim][OAc], respectively. According to Glasser's theory of lattice energy, the hydration enthalpy of cation and anion in infinite dilution aqueous [C6mim][OAc] was calculated to be -598 kJ mol^-1, at 298.15 K. The hydration enthalpy of the [C6mim]+ cation was determined to be -173 kJ mol^-1. In comparison with hydration enthalpy of [C2mim]+, the hydration enthalpy of [C6mim]+ is a little bit weaker. A linear relationship was found by plotting the experimental values of standard molar enthalpies of solution against (T - 298.15) K. The standard molar heat capacity of solution (313 J K-1 mol^-1) was obtained from the slope of the regression line, the specific heat capacity of solution (1.38 J g^ -1 K^-1, and the apparent relative molar heat capacity were also calculated for [C6mim][OAc].
Compounds
#
Formula
Name
1
C12H22N2O2
3-hexyl-1-methylimidazolium acetate
2
H2O
water
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.