Isobaric molar heat capacities of 1-ethyl-3-methylimidazolium acetate ([C1C2Im][OAc]) and 1-hexyl-3- methylimidazolium acetate ([C1C6Im][OAc]) were measured in the temperature range T = (303 to 393) K and at pressures up to 16 MPa. The relative expanded uncertainty of the isobaric molar heat capacity is estimated to be less than 1%. Based on the experimental data in our work and from literature, the isobaric molar heat capacities of [C1C2Im][OAc] and [C1C6Im][OAc] were found to rise with the increasing temperature and the carbon atoms number on the cations, and fall with the increasing pressure. Correlations based on the experimental data were promoted to evaluate the heat capacity of [C1C2Im][OAc] and [C1C6Im][OAc], the absolute relative deviation between calculation and experimental data is less than 1%.
Compounds
#
Formula
Name
1
C8H14N2O2
1-ethyl-3-methylimidazolium acetate
2
C12H22N2O2
3-hexyl-1-methylimidazolium 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.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
1
Molar heat capacity at constant pressure, J/K/mol ; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
Flow calorimetry
50
POMD
2
Molar heat capacity at constant pressure, J/K/mol ; Liquid