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The standard molar enthalpies of formation ofUTeO5andUTe3O9

โœ Scribed by M. Basu; R. Mishra; S.R. Bharadwaj; P.N. Namboodiri; S.N. Tripathi; A.S. Kerkar; S.R. Dharwadkar

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
65 KB
Volume
31
Category
Article
ISSN
0021-9614

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โœฆ Synopsis

The molar enthalpies of solution of UTeO 5 , UTe 3 O 9 , TeO 2 , and UO 3 in HCl (aq, c = 11 mol โ€ข dm -3 ) have been measured by using an isoperibol calorimeter. From these results and other auxiliary data, the standard molar enthalpies of formation f H o m (298.15 K) of UTeO 5 (cr) and UTe 3 O 9 (cr) have been calculated to be -(1606.3 ยฑ 3.5) kJ โ€ข mol -1 and -(2287.2 ยฑ 9.5) kJ โ€ข mol -1 , respectively. These values of enthalpies of formation of UTeO 5 and UTe 3 O 9 are consistent with the second-law enthalpies of formation of these compounds derived from their vapour pressures determined in this laboratory by a transpiration technique.

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