ABSTRACT

Low-temperature heat capacities of the compound Na(C4H7O5)*H2O(s) have been measured with an automated adiabatic calorimeter. A solid solid phase transition and dehydration occur at 290 318K and 367 373 K, respectively. The enthalpy and entropy of the solid solid transition are transHm = (5.75+-0.01) kJ mol-1 and transSm = (18.47+-0.02) JK-1 mol-1. The enthalpy and entropy of the dehydration are dHm = (15.35+-0.03) kJ mol-1 and dSm = (41.35+-0.08) JK-1 mol-1. Experimental values of heat capacities for the solids (I and II) and the solid liquid mixture (III) have been fitted to polynomial equations.

Compounds

#	Formula	Name
1	C4H9NaO6	sodium (2R,3S)-2,3,4-trihydroxybutanoate hydrate

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 2			Crystal 2 Crystal 1 Gas	Adiabatic calorimetry	1
POMD	1	Triple point temperature, K ; Crystal 2			Crystal 2 Crystal 1 Gas	Adiabatic calorimetry	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal 2	Temperature, K; Crystal 2	Pressure, kPa; Crystal 2	Crystal 2	Vacuum adiabatic calorimetry	93
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal 1	Temperature, K; Crystal 1	Pressure, kPa; Crystal 1	Crystal 1	Vacuum adiabatic calorimetry	26

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Thermodynamic properties of hydrated sodium l-threonate Na(C4H7O5)*H2O(s)

Di, Y.-Y.[You-Ying], Tan, Z.-C.[Zhi-Cheng], Gao, S.-L.[Sheng-Li], Chen, S.-P.[San-Ping], Sun, L.-X.[Li-Xian]

ABSTRACT