ABSTRACT

Apparent molar volumes V2,f, apparent molar isentropic compressibilities KS,2,f and viscosity B-coefficients have been determined for L-ascorbic acid, nicotinic acid, thiamine hydrochloride and pyridoxine hydrochloride in water at temperatures (288.15 to 318.15) K from density, sound velocity and viscosity measurements, respectively. Partial molar volumes V2o and partial molar isentropic compressibilities KoS,2 at infinite dilution, and viscosity B-coefficients have been calculated from the corresponding data. The partial molar expansibilities VEo (VEo = ( YV2o/ YT)P), second order derivative ( Y2V2o/ YT2)P, relative association (RA), specific acoustic impedance (Z) and solvation number (Sn) have been calculated. Both volumetric and viscometric studies indicate that nicotinic acid acts as structure promoter where as other vitamins act as structure destroyer. The transition state theory has been used to calculate the activation free energy for viscous flow.

Compounds

#	Formula	Name
1	H2O	water
2	C6H8O6	L-ascorbic acid
3	C6H5NO2	3-carboxylpyridine
4	C12H18Cl2N4OS	thiamine hydrochloride
5	C8H12ClNO3	5-hydroxy-6-methyl-3,4-pyridinedimethanol hydrochloride

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	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Capillary tube (Ostwald; Ubbelohde) method	1
POMD	1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	4
POMD	2 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	23
POMD	2 1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	24
POMD	2 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	26
POMD	3 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	23
POMD	3 1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	15
POMD	3 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	22
POMD	4 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	24
POMD	4 1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	20
POMD	4 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	20
POMD	5 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	24
POMD	5 1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	20
POMD	5 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	20

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Volumetric and viscometric studies on L-ascorbic acid, nicotinic acid, thiamine hydrochloride and pyridoxine hydrochloride in water at temperatures (288.15 to 318.15) K and at atmospheric pressure

Banipal, T. S.[Tarlok S.], Singh, H.[Harpreet], Banipal, P. K.[Parampaul K.], Singh, V.[Vickramjeet]

ABSTRACT