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Thermodynamic properties of Cs5Te3

✍ Scribed by R. de Boer; E.H.P. Cordfunke

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 147 KB
Volume: 29
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.1996.0180

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✦ Synopsis

The enthalpy of solution of Cs5Te3 in (0.55 mol•dm -3 NaClO + 0.5 mol•dm -3 NaOH)(aq) was measured calorimetrically. In combination with auxiliary values the standard molar enthalpy of formation was derived: DfH°m(Cs5Te3,s,298.15 K) = -(942.2 2 8.3) kJ•mol -1 . The enthalpy increment of Cs5Te3 has been measured by drop calorimetry between T = 474 K and T = 856 K, and thermodynamic functions for Cs5Te3 have been calculated. A re-evaluation of the enthalpy of solution of tellurium has led to a slight correction of the previously reported standard molar enthalpy of formation of Cs2Te. The new value is: DfH°m(Cs2Te,s,298.15 K) = -(362.9 2 2.9) kJ•mol -1 .

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