ABSTRACT

The heat capacity of ethyl undecanoate was measured between 110 K and 365 K; the compound crystallized in a metastable form, which re-crystallized slowly to the stable crystalline state during heating. The triple point temperature of the stable form was found to be (259.17 +- 0.04) K and the enthalpy of fusion (36.1 +- 0.1) kJ.mol-1. The purity calculated from the fractional melting curve was 97.5 mol %. The metastable form crystallized at 251.3 K. The heat capacity of ethyl tridecanoate was measured between 175 K and 320 K, the compound also crystallized in a metastable form, which re-crystallized during heating to the stable form. The triple point temperature was found to be (272.4 +- 0.1) K and the enthalpy of fusion was (40.7 +- 0.1) kJ.mol-1.

Compounds

#	Formula	Name
1	C13H26O2	ethyl undecanoate
2	C15H30O2	ethyl tridecanoate

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 Gas	ADIACA:UFactor:8:FP	1
POMD	1	Triple point temperature, K ; Crystal			Crystal Liquid Gas	ADIACA:UFactor:8:FP	1
POMD	1	Normal melting temperature, K ; Metastable crystal			Metastable crystal Liquid Air at 1 atmosphere	HCURVE:FP	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:8	56
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:4	68
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Gas	ADIACA:UFactor:8:FP	1
POMD	2	Triple point temperature, K ; Crystal			Crystal Liquid Gas	ADIACA:UFactor:8:FP	1
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:8	21
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:4	16

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

Thermal properties of Ethyl Undecanoate and Ethyl Tridecanoate by Adiabatic Calorimetry

van Miltenburg, J. C., Oonk, H. A. J.[Harry A. J.]

ABSTRACT