ABSTRACT

Isobaric molar heat capacities at atmospheric pressure were determined for the ternary system dimethyl carbonate + p-xylene + n-decane and the corresponding binary mixtures dimethyl carbonate + p-xylene, dimethyl carbonate + n-decane and p-xylene + n-decane over the whole composition range at 288.15, 298.15 and 308.15 K. From these data, excess isobaric molar heat capacities were calculated using the Benson and Kiyohara s criterion. The obtained values for the binary systems were correlated using a Redlich Kister polynomial, whereas the ternary contribution was fitted by means of the Nagata equation. The data present a gradual crossover from a W-shaped composition dependence, typical in alkyl carbonate + alkane systems, to negative parabolic curves, often found for alkyl carbonate + aromatic hydrocarbon and for aromatic + linear hydrocarbon systems. The results are discussed in terms of the degree of randomness of the mixtures.

Compounds

#	Formula	Name
1	C3H6O3	dimethyl carbonate
2	C10H22	decane
3	C8H10	1,4-dimethylbenzene

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	Small sample (50 mg) DSC	3
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	3
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	3
POMD	3 1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	36
POMD	2 1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	46
POMD	2 3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	39
POMD	3 2 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	114

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Isobaric molar heat capacities of the ternary system dimethyl carbonate + p-xylene + n-decane

Valencia, J. L., Troncoso, J.[Jacobo], Peleteiro, J., Carballo, E., Romani, L.

ABSTRACT