Using the solution-reaction isoperibol calorimeter, molar enthalpies of solution in water for ionic liquid [C4mim][OAc] with different molalities were measured in the temperature range of (288.15 to 308.15 +/- 0.01) K with an interval of 5 K. According to Archer's method or Pitzer's electrolyte solution theory, the values of the standard molar enthalpies of solution the apparent relative molar enthalpy and the parameters Beta(0)L_MX , Beta(1)L_MX were determined for [C4mim][OAc]. According to Krossing's theory of lattice energy, the hydration enthalpy of cation and anion in infinite dilution aqueous [C4mim][OAc] were calculated equal to 531.6 kJ mol-1, at 298.15 K. 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 equal to 339 J K-1 mol-1 was obtained from the slope of the regression line, and the specific heat capacity of solution equal to 1.70 J g-1 K-1, was also determined for [C4mim][OAc].
Compounds
#
Formula
Name
1
C10H18N2O2
1-butyl-3-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.