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Properties of substance:
barium peroxide
skc-file
Group of substances:
inorganic
Physical appearance:
white tetragonal crystals
Empirical formula (Hill's system for organic substances):
BaO
2
Structural formula as text:
BaO2
Molar/atomic mass: 169.34
Melting point (°C):
450
Decomposition temperature (°C):
600
CAS №: 1304-29-6
Solubility (g/100 g of solvent):
acetone
: insoluble [
Ref.
]
hydrogen fluoride
: reaction [
Ref.
]
sulfur dioxide
: insoluble [
Ref.
]
water
: reaction [
Ref.
]
Numerical data:
Interatomic distances (in pm): 149
Density:
4.96 (20°C, g/cm
3
)
Reactions:
[
Ref.1
,
Ref.2
]
BaO
2
+ H
2
SO
4
→ BaSO
4
+ H
2
O
2
Electrode potential:
BaO
2
+ 4H
+
+ 2e
-
→ Ba
2+
+ 2H
2
O, E = 2.365 V (water, 25°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-629.7 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-587.9 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
65.7 (s)
LD
50
(mg/kg):
50 (mice, subcutaneous)
References:
Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 343-344
Вольнов И.И. Перекисные соединения щелочноземельных металлов. - М.: Наука, 1983. - pp. 5-41 [Russian]
Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 171-172 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 55 [Russian]
Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 490 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru