ABSTRACT

Heat capacity for 1-butyl-3-methylimidazolium trifluoroacetate [bmim][CF3COO] and acetate [bmim][CH3COO] in the temperature range of (5 to 370) K has been measured by adiabatic calorimetry. Temperatures and enthalpies of phase transitions in [bmim][CF3COO] have been determined. Thermodynamic functions for the compounds in the condensed state have been calculated. Physicochemical properties for the studied ionic liquids and alkali acetate salts have been compared. The correlation scheme for estimation of Cp of ionic liquids in a range of (190 to 370) K has been developed

Compounds

#	Formula	Name
1	C10H18N2O2	1-butyl-3-methylimidazolium acetate
2	C10H15F3N2O2	1-butyl-3-methylimidazolium trifluoroacetate

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 ; Glass	Temperature, K; Glass	Pressure, kPa; Glass	Glass	VADIAC:UFactor:8	26
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:4	11
POMD	1	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid		Liquid Gas	VADIAC:UFactor:4	79
POMD	1	Molar heat capacity at saturation pressure, J/K/mol ; Glass	Temperature, K; Glass		Glass Gas	VADIAC:UFactor:8	127
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2			Crystal 2 Crystal 1 Gas	ADIACA:UFactor:4	1
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 1			Crystal 1 Liquid Gas	ADIACA:UFactor:2	1
POMD	2	Triple point temperature, K ; Crystal 2			Crystal 2 Crystal 1 Gas	Adiabatic calorimetry	1
POMD	2	Triple point temperature, K ; Crystal 1			Crystal 1 Liquid Gas	ADIACA:UFactor:2	1
POMD	2	Triple point temperature, K ; Crystal 1			Crystal 1 Liquid Gas	ADIACA:UFactor:2	1
POMD	2	Triple point temperature, K ; Glass			Glass Liquid Gas	Adiabatic calorimetry	1
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Glass	Temperature, K; Glass	Pressure, kPa; Glass	Glass	VADIAC:UFactor:8	24
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:8	11
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal 1	Temperature, K; Crystal 1	Pressure, kPa; Crystal 1	Crystal 1	VADIAC:UFactor:8	3
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:8	10
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal 2	Temperature, K; Crystal 2	Pressure, kPa; Crystal 2	Crystal 2	VADIAC:UFactor:8	32
POMD	2	Molar heat capacity at saturation pressure, J/K/mol ; Glass	Temperature, K; Glass		Glass Gas	VADIAC:UFactor:8	184
POMD	2	Molar heat capacity at saturation pressure, J/K/mol ; Crystal 1	Temperature, K; Crystal 1		Crystal 1 Gas	VADIAC:UFactor:32	62
POMD	2	Molar heat capacity at saturation pressure, J/K/mol ; Crystal of unknown type	Temperature, K; Crystal of unknown type		Crystal of unknown type Gas	VADIAC:UFactor:16	55
POMD	2	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid		Liquid Gas	VADIAC:UFactor:4	361
POMD	2	Molar heat capacity at saturation pressure, J/K/mol ; Crystal 2	Temperature, K; Crystal 2		Crystal 2 Gas	VADIAC:UFactor:16	613
POMD	2	Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Crystal 1	Temperature, K; Crystal 1	Pressure, kPa; Crystal 1	Crystal 1	VADIAC:UFactor:8	3
POMD	2	Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Crystal 2	Temperature, K; Crystal 2	Pressure, kPa; Crystal 2	Crystal 2	VADIAC:UFactor:8	32
POMD	2	Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:8	10
POMD	2	Molar entropy, J/K/mol ; Crystal 1	Temperature, K; Crystal 1	Pressure, kPa; Crystal 1	Crystal 1	VADIAC:UFactor:8	3
POMD	2	Molar entropy, J/K/mol ; Crystal 2	Temperature, K; Crystal 2	Pressure, kPa; Crystal 2	Crystal 2	VADIAC:UFactor:8	32
POMD	2	Molar entropy, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:8	10

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Low-temperature heat capacity of hydrophilic ionic liquids [BMIM][CF3COO] and [BMIM][CH3COO] and a correlation scheme for estimation of heat capacity of ionic liquids

Strechan, A. A.[Aliaksei A.], Paulechka, Y. U., Blokhin, A. V., Kabo, G. J.

ABSTRACT