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Measurement of the standard molar Gibbs free energy of formation of Ag2S using Ag+β-alumina solid electrolyte

✍ Scribed by Dominique Bouchard; Christopher W. Bale

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
460 KB
Volume
27
Category
Article
ISSN
0021-9614

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✦ Synopsis

Ag + b-alumina has been employed as a solid electrolyte in order to measure the activities of silver for Ag2S in equilibrium with controlled sulphur atmospheres. Electromotive-force measurements were made in the temperature range 811 K to 1112 K using the galvanic cell:

Manipulation of the results yielded for the standard molar Gibbs free energy of formation of Ag2S with respect to pure Ag(s) and S2(g) at p°= 101.325 kPa: 2Ag(s) + 1 2 S2(g) = Ag2S(s), DfG°m/(J•mol -1 ) = {-85326 + 35.15(T/K)} 2 2500.

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