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

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.