ABSTRACT

In this work, we reported new experimental data on the molar heat capacity, CP, and electrical con-ductivity, , of two ammonium-based deep eutectic solvents (DESs), N,N-diethylethanolammoniumchloride-glycerol and N,N-diethylethanolammonium chloride-ethylene glycol, and their aqueous solu-tions. Heat capacity measurements were performed, using a heat flow differential scanning calorimeter,at atmospheric pressure at temperatures from 303.15 to 353.15 K. The CPvalues were found to increasewith temperature. Excess molar heat capacities, CPE, of the aqueous DES solutions were determined,and represented as function of temperature and DES mole fraction using a Redlich Kister-type equation.Electrical conductivities were measured from 298.15 to 343.15 K, and a modified form of the Arrheniusequation was used to correlate the obtained data with temperature and DES mole fraction. The appliedcorrelations successfully represented the experimental CPand data as function of temperature andcomposition at low average absolute deviations of 0.1 and 1.3%, respectively.

Compounds

#	Formula	Name
1	C6H16ClNO	2-(diethylamino)ethanol hydrochloride
2	C3H8O3	glycerol
3	C2H6O2	1,2-ethanediol
4	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.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	2 1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 1; Liquid	Liquid	Small sample (50 mg) DSC	11
POMD	2 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 1; Liquid	Liquid	Alternating current cell with electrodes	10
POMD	3 1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 1; Liquid	Liquid	Small sample (50 mg) DSC	11
POMD	3 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 1; Liquid	Liquid	Alternating current cell with electrodes	10
POMD	2 4 1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	99
POMD	2 4 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	90
POMD	2 4 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	90
POMD	3 4 1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	99

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Molar heat capacities and electrical conductivities of two ammonium-based deepeutectic solvents and their aqueous solutions

Siongco, K. R.[Kathrina R.], Leron, R. B.[Rhoda B.], Caparanga, A. R.[Alvin R.], Li, M.-H.[Meng-Hui]

ABSTRACT