ABSTRACT

This paper presents the effect of five dissolved inorganic salts (sodium chloride, NaCl; calcium chloride, CaCl2; zinc chloride, ZnCl2; cadmium chloride, CdCl2; ammonium chloride, NH4Cl) on the enthalpy of mixing (HE) of the binary system ethanol + pyridine measured at 303.15 K using an isothermal displacement calorimeter with vapor space. Compared to the salt-free system, the addition of selected salts (0.05 mass fraction) significantly increased the HE values along the negative direction in the order of ZnCl2 greater than NaCl greater than CdCl2 CaCl2 greater than NH4Cl. With increasing salt concentration (0.10 mass fraction), the HE values decreased in the positive direction for the salt CdCl2 and increased in the negative direction for the salt CaCl2 which exemplifies the importance of solute-pyridine interaction. The experimental values of HE were fitted into the Redlich-Kister equation, and the deviations from the ideal value and binary parameters are reported.

Compounds

#	Formula	Name
1	C2H6O	ethanol
2	C5H5N	pyridine
3	ClNa	sodium chloride
4	Cl2Zn	zinc chloride
5	CaCl2	calcium chloride
6	CdCl2	cadmium chloride
7	ClH4N	ammonium chloride (NH4Cl)

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	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Pycnometric method	1
POMD	2	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Pycnometric method	1
POMD	1 2	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Calvet calorimetry	12
POMD	1 2 3	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid Mole fraction - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Calvet calorimetry	12
POMD	1 2 4	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid Mole fraction - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Calvet calorimetry	12
POMD	1 2 5	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid Mole fraction - 5; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Calvet calorimetry	24
POMD	1 2 6	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid Mole fraction - 6; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Calvet calorimetry	20
POMD	1 2 7	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid Mole fraction - 7; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Calvet calorimetry	20

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

Effect of Dissolved Inorganic Salts on the Enthalpy of Mixing of the Ethanol + Pyridine System at 303.15 K

Tamilarasan, R., Prabu, A. A., Kim, K. J.[Kap Jin], Kumar, M. D.

ABSTRACT