ABSTRACT

Densities of solutions of sodium tetraphenylborate, tetraphenylphosphonium bromide, sodium bromide, and sodium perchlorate solutions in N,N-dimethylacetamide and N,N-dimethylformamide have been measured over the concentration range of (0.015 to 0.40) mol*kg-1 at temperatures between T = 283.15 K and T = 333.15 K. From densities, apparent molar volumes and partial molar volumes of the salts at infinite dilution as well as the expansibilities have been evaluated. Moreover, the apparent molar isentropic compressibility of all electrolytes has been determined from sound velocity measurements at T = 298.15 K. The limiting apparent molar compressibilities have been discussed in terms of possible methods of splitting them into ionic contributions.

Compounds

#	Formula	Name
1	C24H20BNa	sodium tetraphenylboron
2	C24H20BrP	tetraphenylphosphorane bromide
3	BrNa	sodium bromide
4	ClNaO4	sodium perchlorate
5	C4H9NO	N,N-dimethylethanamide
6	C3H7NO	dimethylformamide

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	5	Speed of sound, m/s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	PULSEH:UFactor:2	1
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	28
POMD	6	Speed of sound, m/s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	PULSEH:UFactor:2	1
POMD	6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	16
POMD	5 1	Speed of sound, m/s ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	PULSEH:UFactor:2	11
POMD	5 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	77
POMD	5 2	Speed of sound, m/s ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	PULSEH:UFactor:2	11
POMD	5 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	77
POMD	5 3	Speed of sound, m/s ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	PULSEH:UFactor:2	11
POMD	5 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	77
POMD	5 4	Speed of sound, m/s ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	PULSEH:UFactor:2	11
POMD	5 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	77
POMD	6 1	Speed of sound, m/s ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	PULSEH:UFactor:2	10
POMD	6 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	70
POMD	6 2	Speed of sound, m/s ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	PULSEH:UFactor:2	10
POMD	6 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	70
POMD	6 3	Speed of sound, m/s ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	PULSEH:UFactor:2	11
POMD	6 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	77
POMD	6 4	Speed of sound, m/s ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	PULSEH:UFactor:2	11
POMD	6 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	77

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Apparent Molar Compressibilities and Volumes of Some 1,1-Electrolytes in N,N-Dimethylacetamide and N,N-Dimethylformamide

Placzek, A.[Anna], Koziel, H.[Hanna], Grzybkowski, W.[Waclaw]

ABSTRACT