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

IX.1 Sulfur compounds and complexes 213
Data for the determination of Δ f m (SnS, α, 298.15 K) were obtained by the
transpiration method (measurements on SnS + H 2 mixtures), cell-potential
measurements, mass spectrometry or by calorimetry (heat of reaction of SnS with Zn).
The results are summarised in Table IX-5. Table IX-6 contains values quoted in
compilations/evaluations. In Table IX-5, the uncertainties given for results from the
transpiration method reflect only the reproducibility of the data. Uncertainties in the
ο
data used for Δ f H m (H 2 S, g, 298.15 K) and the necessary data for α-SnS are
ο
approximately 1.4 kJ·mol –1 . The selected value of Δ fHm(SnS, α, 298.15 K) is based on
the data of [1951SUD], [1955RIC], [1965RAU], [1966ESP] and [1973MOR/STO].
H ο
Table IX-5: Experimental determination of the standard enthalpy of formation of α-SnS
after [1991GUR/VEY].
Reference Method Δ fH ο
m (SnS, α, 298.15 K)/kJ·mol –1
Second law
Third law
[1925JEL/ZAK] Transpiration − 102.1 ± 10.0
[1930BRI/KAP] Transpiration − 91.1 ± 2.3
[1934BRI/KAP] Transpiration − 77.0 ± 25.0 − 96.8 ± 2.3
[1938KAP/MAK] Cell potential − 84.8 ± 1.0
[1951SUD] Transpiration − 89.0 ± 25.0 − 107.8 ± 2.3
[1955RIC] Transpiration − 106.9 ± 7.0 − 106.3 ± 0.4
[1965RAU] Transpiration − 109.0 ± 0.2
[1966ESP] Transpiration − 111.9 ± 0.2 − 107.6 ± 0.4
[1973MOR/STO],
Calorimetry − 111.0 ± 5.0
[1973MOR/STO2]
[1979WIE/CSI] Mass spectrometry − 102.9 ± 4.0
[1984FRE/ROS] Cell potential − 87.0 ± 4.0 − 100.4 ± 0.6
[1984FRE/ROS] Transpiration − 110.2 ± 0.3
Table IX-6: The standard enthalpy of formation of α-SnS as quoted in compilations/
evaluations.
*
Reference Δ fH m (SnS, α, 298.15 K)/kJ·mol –1
[1993BAR] − 107.947
[1978ROB/HEM], [1995ROB/HEM] − 106.541 ± 1.464
[1973BAR/KNA], [1999BIN/MIL] − 108.0
[1952ROS/WAG] − 77.8
[1982WAG/EVA] − 100.0
[1991GUR/VEY] − 109.622 ± 4.000 *
[1974MIL] − 108.0 ± 2.0
Value selected by this review.
CHEMICAL THERMODYNAMICS OF TIN, ISBN 978-92-64-99206-1, © OECD 2012