ABSTRACT

Heat capacity of MgCl2*6H2O was measured in temperature range from 298.15 to 401.15 K. Polynomial function was used to fit temperature dependence of heat capacity up to 371.15 K and corresponding thermodynamic functions (HT - H298.15, ST - S298.15, GT - G298.15) were calculated. Thermal stability test (50 heating/cooling cycles) of pure MgCl2*6H2O shows supercooling about 37 K, thus some nucleating agents were tested. Addition of SrCO3 (1 wt%) and Sr(OH)2 (0.5 wt%) almost fully suppresses the supercooling while addition of Mg(OH)2 decreases supercooling by 19 K.

Compounds

#	Formula	Name
1	Cl2H12MgO6	magnesium chloride hexahydrate

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 enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	1	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	92
POMD	1	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	15
POMD	1	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	15

Thermodynamics Research Center / ThermoML | Thermochimica Acta

STUDY OF MAGNESIUM CHLORIDE HEXAHYDRATE AS HEAT STORAGE MATERIAL

Pilar, R.[Radim], Svoboda, L.[Ladislav], Honcova, P.[Pavla], Oravova, L.[Lucie]

ABSTRACT