Thermodynamics Research Center / ThermoML | Thermochimica Acta

Vapor pressure measurements of AgBr by the Knudsen effusion method

Nagata, Tetsuya, Iizuka, Atsushi, Shibata, Etsuro
Thermochim. Acta 2019, 671, 32-35
ABSTRACT
The vapor pressure of silver bromide (AgBr) liquid was measured by the Knudsen effusion method. The ratio of the vapor species of silver bromide was calculated from the literature Hildenbrand and Lau, Pankratz [3,6], and the vapor pressures were calculated on the basis of the ratio. As reported in the literature Hildenbrand and Lau [3], we considered the vapor species to be monomers (AgBr) and trimers (Ag3Br3). The partial pressures of AgBr [pmonomer(Pa)] and Ag3Br3 [ptrimer(Pa)] were respectively fitted by the following linear equations over the temperature range 829.9-929.9 K: lnpmonomer= -(23590 +- 519) / T + 25.22 +- 0.59, ln(ptrimer) = -(19449 +- 509) / T + (20.42 +- 0.58). The total vapor pressure of silver bromide [ptotal(Pa)] fitted the following linear equation: ln(ptotal) = -(21653 +- 529) / T + (23.72 +- 0.60).
Compounds
# Formula Name
1 AgBr silver 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 Constraint Phase Method #Points
  • POMD
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Calculated from knudsen effusion weight loss
  • 24