Chemical Thermodynamics of Tin - Volume 12 - OECD Nuclear ...

X.2 Phosphorus compounds and complexes 235
ο
–1
C p,m (Ag 6 Sn 4 P 12 Ge 6 , cr, 298.15 K) = (628.82 ± 9.40) J·K
–1·mol
Enthalpy increment, entropy and Gibbs energy increment depending on
temperature have been obtained by numerical integration of the smoothed heat capacity
values listed in Table X-2, resulting in:
ο
S m (Ag 6 Sn 4 P 12 Ge 6 , cr, 298.15 K) = (903.13 ± 13.00) J·K –1·mol –1 .
ο ο
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These values of ΔfH m, C p,m
, and S m
of Ag 6 Sn 4 P 12 Ge 6 (cr) at 298.15 K are
selected by this review, and yield:
ο
ΔfG m
(Ag 6 Sn 4 P 12 Ge 6 , cr, 298.15 K) = − (78.48 ± 4.00) kJ·mol –1 .
T / K
Table X-2: Smoothed calorimetric values for [Ag 6 Sn 4 P 12 ]Ge 6 [1989GME/HON].
ο
p,m
C /J·mol –1 K –1 HT ( ) − H(0K)/
kJ·mol –1
ο
m
S /J·mol –1 K –1 − ( GT ( ) − G(0K))/
kJ·mol –1
3.5 - 0.2204 0.1038 0.1429
4 0.27898 0.33845 0.13521 0.20239
4.5 0.39749 0.50566 0.17446 0.27944
5 0.56773 0.74448 0.22464 0.37871
6 1.1179 1.5608 0.37198 0.67101
7 2.0389 3.1036 0.60800 1.1523
8 3.3981 5.7811 0.96351 1.9269
9 5.2013 10.044 1.4636 3.1279
10 7.4257 16.323 2.1231 4.9077
12 13.072 36.563 3.9526 10.868
14 20.198 69.600 6.4849 21.188
16 28.645 118.23 9.7197 37.277
18 38.238 184.94 13.637 60.523
20 48.784 271.82 18.204 92.259
25 77.908 587.36 32.165 216.77
30 107.90 1052.3 49.039 418.78
35 134.34 1660.5 67.734 710.21
40 167.80 2427.6 88.178 1099.4
45 193.80 3332.9 109.47 1593.3
50 216.89 4360.8 131.11 2194.8
55 237.54 5497.8 152.77 2904.5
60 256.23 6733.0 174.25 3722.2
65 273.41 8057.6 195.44 4646.6
70 289.55 9465.3 216.30 5676.1
75 305.11 10952 236.81 6809.0
80 320.57 12516 257.00 8043.7
(Continued on next page)
CHEMICAL THERMODYNAMICS OF TIN, ISBN 978-92-64-99206-1, © OECD 2012