ABSTRACT

The energy of combustion of L-tryptophan at 298.15 K was determined by static-bomb isoperibolic calorimetry. The heat capacity of L-tryptophan was measured by vacuum adiabatic calorimetry over the temperature range from (7 to 373) K. A solid-to-solid transition is described. Smoothed values of the main thermodynamic functions for the crystal state over the temperature interval from 5 K to 370 K were calculated. The enthalpy of formation, entropy of formation and Gibbs energy of formation at 298.15 K of L-tryptophan in the solid state were computed on the basis of the experimental results obtained. All results are compared to experimental values reported in the literature.

Compounds

#	Formula	Name
1	CO2	carbon dioxide
2	N2	nitrogen
3	H2O	water
4	O2	oxygen
5	C11H12N2O2	L-tryptophan

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	5	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal		Crystal	Estimated from volume and mass a tablet	1
POMD	5	Triple point temperature, K ; Crystal 2			Crystal 2 Crystal 1 Gas	Adiabatic calorimetry	1
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	13
POMD	5	Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	13
POMD	5	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	13
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Crystal 1	Temperature, K; Crystal 1	Pressure, kPa; Crystal 1	Crystal 1	Small (less than 1 g) adiabatic calorimetry	32
POMD	5	Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Crystal 1	Temperature, K; Crystal 1	Pressure, kPa; Crystal 1	Crystal 1	Small (less than 1 g) adiabatic calorimetry	32
POMD	5	Molar entropy, J/K/mol ; Crystal 1	Temperature, K; Crystal 1	Pressure, kPa; Crystal 1	Crystal 1	Small (less than 1 g) adiabatic calorimetry	32
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	134
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Crystal 1	Temperature, K; Crystal 1	Pressure, kPa; Crystal 1	Crystal 1	Small (less than 1 g) adiabatic calorimetry	288
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	19
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Crystal 1	Temperature, K; Crystal 1	Pressure, kPa; Crystal 1	Crystal 1	Small (less than 1 g) adiabatic calorimetry	36
RXND	5 1 2 3 4	Specific internal energy of reaction at constant volume, J/g				Static bomb calorimetry	1

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic properties of L-tryptophan

Lukyanova, V. A., Druzhinina, A. I., Pimenova, S. M., Ioutsi, V. A., Buyanovskaya, A. G., Takazova, R. U., Sagadeyev, E. V., Gimadeev, A. A.

ABSTRACT