Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Low-temperature heat capacity and thermodynamic functions of natural chalcanthite

Bissengaliyeva, M. R., Bekturganov, N. S., Gogol, D. B., Taimassova, S. T.[Sh.T.]
J. Chem. Thermodyn. 2017, 111, 199-206
ABSTRACT
The heat capacity of natural chalcanthite (copper sulfate pentahydrate, CuSO4 5H2O) from the deposit Kosmurun has been measured by the method of low-temperature adiabatic calorimetry over the temperature range of (4.3-320) K. The identity of the mineral was proved by methods of XRD, EMPA, IR and Raman spectroscopy. The thermodynamic functions have been calculated based on the experimental data on the heat capacity. The lattice component of heat capacity below 20 K was extracted. The standard values of the heat capacity and entropy for natural chalcanthite are as follows: C p,m = 288.0 +- 0.4 J mol 1 K 1, S m = 295.2 +- 0.8 J mol 1 K 1.
Compounds
# Formula Name
1 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.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Small (less than 1 g) adiabatic calorimetry
  • 465
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Small (less than 1 g) adiabatic calorimetry
  • 44
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Small (less than 1 g) adiabatic calorimetry
  • 44
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Small (less than 1 g) adiabatic calorimetry
  • 44
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Small (less than 1 g) adiabatic calorimetry
  • 797