ABSTRACT

The speed of sound in (heptane + dodecane) mixtures was measured over the whole concentration range at pressures up to 101 MPa and within the temperature range from (293 to 318) K. The density of (heptane + dodecane) was measured in the whole composition range under atmospheric pressure and at temperatures from (293 to 318) K. The densities and heat capacities of these binaries at the same temperatures were calculated for pressures up to 100 MPa from the speeds of sound under elevated pressures together with the densities and heat capacities at atmospheric pressure. The effects of pressure and temperature on the excess molar volume and the excess molar heat capacity are discussed.

Compounds

#	Formula	Name
1	C7H16	heptane
2	C12H26	dodecane

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	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Pulse-echo method	48
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB::UFactor:4	6
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Pulse-echo method	47
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB::UFactor:4	6
POMD	2 1	Speed of sound, m/s ; Liquid	Mole fraction - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Pulse-echo method	66
POMD	2 1	Mass density, kg/m3 ; Liquid	Mole fraction - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:4	78
POMD	2 1	Speed of sound, m/s ; Liquid	Mole fraction - 1; Liquid Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Pulse-echo method	419

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic and acoustic properties of (heptane + dodecane) mixtures under elevated pressures

Dzida, M.[Marzena], Cempa, M.[Magdalena]

ABSTRACT