Vapor pressures over CuBr and ZnBr2 solids were measured by the Knudsen effusion method assuming that the vapor species consisted solely of trimers and monomers, respectively. The vapor pressures fitted the following linear equations over the temperature ranges considered:CuBr, ln(p/Pa) = (14936 +- 371) (K/T) + (23.73 +- 0.63)(from 528.8 to 658.2K) ;and ZnBr2, ln (p/Pa) = (13867 +- 247)(K/T) + (26.68 +- 0.49) (from 452.5 to 574.0K).The standard sublimation enthalpies for CuBr and ZnBr2 were estimated to be 124.2 +- 3.1 and 115.3 +- 2.1 kJ/mol, and the standard sublimation entropies were estimated as 197.3 +- 5.2 and 221.8 +- 4.1 J/(mol K), respectively. Identification of the predominant vapor species from each metal bromide was conducted using mass spectrometry. From the analysis, it was confirmed that the main vapor species were the trimer (Cu3Br3) for CuBr and the monomer (ZnBr2) for ZnBr2.
Compounds
#
Formula
Name
1
BrCu
copper(1+) bromide
2
Br2Zn
zinc 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.