Determination of the Molar Enthalpy of Solution for Ionic Liquid [C5mim][OAc](1-pentyl-3-methylimidazolium acetate) in the Temperature Range from 288.15 to 308.15 K
The molar enthalpies of solution, ?solHm, for ionic liquid [C5mim][OAc] with different molalities were measured by the solution-reaction isoperibol calorimeter in the temperature range from 288.15 to 308.15 K with an interval of 5 K. According to Archer s method, the standard molar enthalpies of solution, ?solHm?, and the apparent relative molar enthalpy, FL, for [C5mim][OAc] were determined. In terms of Glasser s theory of lattice energy, the hydration enthalpy of the cation, ?H+ ([C5mim]+) = -178 kJ*mol 1 was obtained at 298.15 K. Compared with hydration enthalpy of [C2mim]+, ?H+ ([C2mim]+) = -233 kJ*mol 1, the hydration of [C5mim]+ is weaker than [C2mim]+. The plot of ?solHm? vs (T 298.15) K is a good straight line and its slope is the standard molar heat capacity of solution, ?Cp,m? = 231 J*K 1*mol 1, so that the specific heat capacity of solution, ?Cp? = 1.09 J*g 1*K 1, was obtained for IL [C5mim][OAc].
Compounds
#
Formula
Name
1
H2O
water
2
C11H20N2O2
1-methyl-3-pentylimidazolium acetate
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.