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

356
A Discussion of selected references
Figure A-39: Determination of the enthalpy of dissolution of SnCl 2·2H 2 O(cr) according
to the reaction SnCl 2·2H 2 O(cr) Sn 2+ + 2 Cl – + 2 H 2 O(l) in HClO 4 medium at 25 °C.
Extrapolation to infinite dilution according to [1967VAS] (: experimental data of
[1976VAS/KOK]; solid line: linear fit; dotted lines: 95% confidence limits).
3.5
3.0
SnCl 2·2H
2
O(cr) Sn 2+ (aq) + 2 Cl – (aq) + 2H
2
O(l)
(Δ
r
H - F (I)
Vas
)/kcal·mol –1
2.5
2.0
1.5
1.0
Δ diss
H° m
(SnCl 2·2H 2
O, 298.15 K) = (1.05 ± 0.11) kcal·mol –1
= (4.40 ± 0.45) kJ·mol –1
Figure A-40: Determination of the enthalpy of dissolution of SnCl 2·2H 2 O(cr) according
to the reaction SnCl 2·2H 2 O(cr) Sn 2+ + 2 Cl – + 2 H 2 O(l) in HClO 4 medium at 25 °C.
Extrapolation to infinite dilution according to [1997ALL/BAN] (Eq. IX.72) (:
experimental data of [1976VAS/KOK]; solid line: linear fit; dotted lines: 95%
confidence limits).
12
0.0 0.5 1.0 1.5 2.0 2.5 3.0
I / mol·kg –1
SnCl 2·2H 2
O(cr) Sn 2+ (aq) + 2 Cl – (aq) + 2H 2
O(l)
(Δ r
H - 2·L – F (I) SIT
)/kJ·mol –1
10
8
6
4
ΔH° m
(SnCl 2·2H 2
O, 298.15 K) = (3.19 ± 0.43) kJ·mol –1
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
I / mol·kg –1
CHEMICAL THERMODYNAMICS OF TIN, ISBN 978-92-64-99206-1, © OECD 2012