| Autor: |
Karyakin, N., Chernorukov, N., Suleimanov, E., Trostin, V., Alimzhanov, M., Makarov, A. |
| Zdroj: |
Russian Journal of General Chemistry; Oct2001, Vol. 71 Issue 10, p1513-1517, 5p |
| Abstrakt: |
Reaction calorimetry was used to determine standard enthalpies of formation at 298.15 K for crystalline NaNbUO6 (-2580.0±2.0 kJ/mol) and NaNbUO6·H2O (-2876.5±1.5 kJ/mol). The heat capacities of these compounds were studied in the range 80-300 K by adiabatic vacuum calorimetry, and their thermodynamic functions were calculated. Standard entropies (-540.5±4.1 and -730.6±4.1 J mol- 1 K- 1) and Gibbs functions of formation at 298.15 K (-2419.0±2.0 and -2658.5±2.5 kJ/mol) for NaNbUO6 and NaNbUO6. H2O, respectively, were calculated. Thermodynamic functions for a number of reactions yielding these compounds were calculated and examined. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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