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Molar heat capacity at temperatures from approximately 5 K to 326 K and derived thermodynamic properties toT= 320 K of ammonium hexafluorogermanate (NH4)2GeF6

✍ Scribed by Jane E. Callanan; Ron D. Weir; Edgar.F. Westrum; Jr.

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 174 KB
Volume: 29
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.1997.0250

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✦ Synopsis

The molar heat capacity of ammonium hexafluorogermanate NH GeF was measured 4 2 6 from T f 5 K to T s 326 K by adiabatic calorimetry. Our results show that neither a transition nor the metastability that sometimes occurs in R MX compounds was present. 2 6 T 0 ÄŽ . 4 Ž . From our results, the standard molar entropy ⌬ S NH GeF , cr rR s 36.30 " 0.04 , 0 m 4 2 6 . y1 . y1 where T s 298.15 K and R s 8.31451 J K mol ; on the basis of this result, the function 0 ÄŽ . 4 Ž . ⌽ NH GeF , cr rR s 17.87 " 0.03 at T s 298.15 K. Smoothed values of the standard m 42 6

thermodynamic functions are tabulated to T s 320 K.

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