Thermodynamics Research Center / ThermoML | Thermochimica Acta

Vapor pressure of methylammonium halides. Part I: Setup verification and vapor pressure of methylammonium chloride

Ivanov, I.L., Bolyachkina, M.S., Mazurin, M.O., Tsvetkov, D.S., Sereda, V. V., Zuev, A.Yu.
Thermochim. Acta 2017, 658, 24-30
ABSTRACT
The experimental setup for equilibrium vapor pressure measurement by means of transpiration technique was assembled and successfully verified using NH4Cl as a reference compound. The equilibrium vapor pressure of methylammonium chloride was measured as a function of temperature in the range of 393 - 513 K. Standard enthalpy and entropy of sublimation of CH3NH3Cl were determined. Both values were found to be in agreement with those directly calculated from the available thermodynamic data.
Compounds
# Formula Name
1 CH6ClN methylammonium chloride
2 ClH4N ammonium chloride (NH4Cl)
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
  • Vapor or sublimation pressure, kPa ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Transpiration method
  • 11
  • POMD
  • 2
  • Vapor or sublimation pressure, kPa ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Transpiration method
  • 7