ABSTRACT

The equilibrium vapor pressure of methylammonium bromide was measured as a function of temperature in the range of 433-503 K. Standard enthalpy and entropy of sublimation of CH3NH3Br at 298.15 K and 1 atm were determined as (196.7 +- 2.8) kJ*mol-1 and (280.0 +- 5.6) J*mol-1 K-1, respectively. The measured value of sublimation enthalpy was found to be in agreement with that directly calculated from the available thermodynamic data. Standard entropy of the crystalline CH3NH3Br at 298.15 K was determined for the first time as (160.2 +- 5.6) J*mol-1 K-1.

Compounds

#	Formula	Name
1	CH6BrN	methylammonium bromide

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	Phase	Method	#Points
POMD	1	Triple point temperature, K ; Crystal 3		Crystal 3 Crystal 2 Air at 1 atmosphere	DSC	1
POMD	1	Triple point temperature, K ; Crystal 2		Crystal 2 Crystal 1 Air at 1 atmosphere	DSC	1
POMD	1	Triple point temperature, K ; Crystal 1		Crystal 1 Liquid Air at 1 atmosphere	DSC	1
POMD	1	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 3		Crystal 3 Crystal 2 Air at 1 atmosphere	DSC	1
POMD	1	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2		Crystal 2 Crystal 1 Air at 1 atmosphere	DSC	1
POMD	1	Vapor or sublimation pressure, kPa ; Crystal 2	Temperature, K; Crystal 2	Crystal 2 Gas	Transpiration method	6
POMD	1	Vapor or sublimation pressure, kPa ; Crystal 1	Temperature, K; Crystal 1	Crystal 1 Gas	Transpiration method	4

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Vapor pressure of methylammonium halides. Part II: Vapor pressure and standard entropy of methylammonium bromide

Ivanov, I.L., Mazurin, M.O., Tsvetkov, D.S., Malyshkin, D.A., Sereda, V.V., Zuev, A.Yu.

ABSTRACT