A critical assessment of the standard molar gibbs free energy of formation of NiWO4 Article

Raj, PM. (1995). A critical assessment of the standard molar gibbs free energy of formation of NiWO4 . BULLETIN OF MATERIALS SCIENCE, 18(5), 623-630. 10.1007/BF02744848

cited authors

  • Raj, PM

authors

abstract

  • Three independent studies have been reported on the free energy of formation of NiWO4. Results of these measurements are analyzed by the "third-law" method, using thermal functions for NiWO4 derived from both low and high temperature heat capacity measurements. Values for the standard molar enthalpy of formation of NiWO4 at 298·15 K obtained from "third-law" analysis are compared with direct calorimetric determinations. Only one set of free energy measurements is found to be compatible with calorimetric enthalpies of formation. The selected value for Δf H m 0 (NiWO4, cr, 298·15 K) is the average of the three calorimetric measurements, using both high temperature solution and combustion techniques, and the compatible free energy determination. A new set of evaluated data for NiWO4 is presented. © 1995 The Indian Academy of Sciences.

publication date

  • September 1, 1995

published in

Digital Object Identifier (DOI)

start page

  • 623

end page

  • 630

volume

  • 18

issue

  • 5