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

IX.1 Sulfur compounds and complexes 211
100 ≤ T/K ≤ 875, see Table IX-3 and Figure IX-1. The selected data [1991GUR/VEY]
are based on those of [1958ORR/CHR] and [1953KIN/TOD].
Table IX-2: The heat capacity of α-SnS as measured (M) and evaluated (E).
T/K C ο –1
p,m
(SnS, α, T )/J·K
–1·mol
[1974BLA/IGE]
(M)
[1993BAR]
(E)
[1973BAR/KNA]
(E)
[1968FEI/NAZ]
[1991GUR/VEY2]
298.15 49.257 49.258 49.2
300 49.01 49.262 49.262 49.7 48.8
350 50.25 49.2
400 51.49 50.562 50.559 54.0 51.1
450 52.73 51.6
500 53.97 52.844 52.844 55.4 52.3
550 55.21 53.4
600 56.45 55.513 55.513 55.1
The numbers of significant figures are those of the original experimenter/evaluator.
(E)
Table IX-3: The heat capacity of α-SnS as represented by fitting equations of the type:
ο
C p,m
ο
C p,m
ο
C p,m
ο
p,m
(SnS, α, T )/J·K –1·mol –1 = exp{a + b ln(T/K) + c [ln(T/K)] 2 + d [ln(T/K)] 3 } Ref. (1)
(SnS, α, T )/J·K –1·mol –1 = a + b T/K + c (T/K) –2 Refs. (2)
(SnS, α, T )/J·K –1·mol –1 = a + b T/K Ref. (3)
C (SnS, α, T )/J·K –1·mol –1 = a. Ref. (3)
Refs. T/K a b c d
(1) 100 − 875 − 19.1440 11.6659 − 1.99273 0.114905
(2) 298 − 875 35.7 3.13×10 –2 3.76×10 –5
(3) 875 − 1153 35.69 7.48×10 –3
(3) 1153 − 1250 74.89
References: (1): [1980WIE/CSI2] (2): [1958ORR/CHR], [1960KEL], [1973BAR/KNA], and
[1999BIN/MIL]; (3): [1958ORR/CHR].
A value for the standard entropy was derived from mass spectrometric
measurements [1979WIE/CSI]. The low temperature heat-capacity measurements of
[1953KIN/TOD] were chosen by [1974MIL], [1991GUR/VEY] for the determination of
m (SnS, cr, 298.15 K). Re-evaluation of the heat-capacity data of King and Todd by
these reviewers essentially confirmed their entropy value which was selected, see
S ο CHEMICAL THERMODYNAMICS OF TIN, ISBN 978-92-64-99206-1, © OECD 2012