This paper presents the results of the thermochemical study of hydrous copper sulfate CuSO4*5H2O performed on a high-temperature heat-flux Tian Calvet microcalorimeter. The samples of two natural chalcanthite (Kosmurun ore deposit, Kazakhstan, and Lavrion deposit, Greece) and synthetic hydrous copper sulfate (blue vitriol) were characterized by X-ray microprobe analysis, X-ray powder diffraction, thermal analysis, FTIR and Raman spectroscopy. The enthalpy of dehydration at T = 298.15 K was measured, and the standard molar enthalpies of formation from the elements were determined by the melt solution calorimetry in accordance with Hess s law. The values of DfH0 m (T = 298.15 K) were found to be (2267.2 +- 4.1) kJ mol-1 for natural chalcanthite and (2272.6 +- 6.0) kJ mol-1 for synthetic hydrous copper sulfate (blue vitriol).
Compounds
#
Formula
Name
1
Cu
copper
2
S
sulfur
3
H2
hydrogen
4
O2
oxygen
5
CuO4S
copper sulfate
6
H2O
water
7
CuH10O9S
copper(II) sulfate pentahydrate
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.