Thermodynamics Research Center / ThermoML | Thermochimica Acta

Thermodynamic Studies of Crystalline 2-Amino-5-nitropyridine (C5H5N3O2)

Shi, Q.[Quan], Tan, Z.-C.[Zhi-Cheng], Di, Y.-Y.[You-Ying], Tong, B.[Bo], Wang, S.-X.[Shao-Xu], Li, Y.-S.[Yan-Sheng]
Thermochim. Acta 2007, 463, 1-2, 6-9
ABSTRACT
Low-temperature heat capacity Cp, m of 2-amino-5-nitropyridine (C5H5N3O2; CAS 4214-76-0) was measured in the temperature range from 80 to 396 K with a high precision automated adiabatic calorimeter. No phase transition or thermal anomaly was observed in this range. The thermodynamic functions [HT H298.15] and [ST S298.15] were calculated in the range from 80 to 395 K based on the heat capacity data. The standard molar energy and standard molar enthalpy of combustion have been determined, dcU(C5H5N3O2, s) = - (2676.26 +- 0.24) kJ.mol-1 and dcH(C5H5N3O2, s) = - (2673.16 +- 0.24) kJ.mol-1, by means of a precision oxygen-bomb combustion calorimeter at T = (298.15 +- 0.001) K. The standard molar enthalpy of formation has been derived, dfH(C5H5N3O2, s) = - (8.97 +- 0.99) kJ.mol-1, from the standard molar enthalpy of combustion in combination with other auxiliary thermodynamic quantities through a Hess thermochemical cycle. The thermodynamic properties were further investigated through differential scanning calorimeter (DSC) and the thermogravimetric (TG) analysis.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 N2 nitrogen
3 H2O water
4 O2 oxygen
5 C5H5N3O2 2-amino-5-nitropyridine
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
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Vacuum adiabatic calorimetry
  • 102
  • POMD
  • 5
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Vacuum adiabatic calorimetry
  • 65
  • POMD
  • 5
  • Molar enthalpy, kJ/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Vacuum adiabatic calorimetry
  • 65
  • POMD
  • 5
  • Molar entropy, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Vacuum adiabatic calorimetry
  • 65
  • RXND
  • 5
  • 1
  • 2
  • 3
  • 4
  • Molar internal energy of reaction at constant volume, kJ/mol
  • Static bomb calorimetry
  • 1