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The thermodynamic stability and hydration enthalpy of strontium cerate doped by yttrium | | N.I. Matskevich
; Th. Wolf
; M.Yu. Matskevich
; | | Date: |
27 Aug 2005 | | Subject: | Materials Science; Other | cond-mat.mtrl-sci cond-mat.other | | Affiliation: | Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia), Th. Wolf (Forschungszentrum Karlsruhe, Institute of Solid State Physics, Karlsruhe, Germany), M.Yu. Matskevich (Nikolaev Institute of I | | Abstract: | The standard molar enthalpy of formation of SrY0.05Ce0.95O2.975 has been derived by combining the enthalpy of solution of this compound in 1 M HCl + 0.1 KI obtained by us and auxiliary literature data. The following value has been derived: DfH (SrY0.05Ce0.95O2.975, s, 298.15 K) = -1720.4 (3.4) kJ/mol. The obtained value has been used to obtain the formation enthalpy of SrY0.05Ce0.95O2.975 from the mixture of binary oxides (DoxH (298.15 K) = -45.9 (3.4) kJ/mol) and formation enthalpy of reaction of SrY0.05Ce0.95O2.975 with water forming Sr(OH)2, CeO2, Y2O3 (DrH (298.15 K) = -85.5 (3.4) kJ/mol). Data obtained by solution calorimetry and additional information on the entropies of different substances have shown that SrY0.05Ce0.95O2.975 is thermodynamically stable with respect to a mixture of SrO, Y2O3, CeO2 and that the reaction of SrY0.05Ce0.95O2.975 with water is thermodynamically favourable. | | Source: | arXiv, cond-mat/0508654 | | Services: | Forum | Review | PDF | Favorites | |
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