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Properties of substance:
lead(II,II,IV) oxide
Synonyms:
minium
Group of substances:
inorganic
Physical appearance:
red tetragonal crystals
Empirical formula (Hill's system for organic substances):
O
4
Pb
3
Structural formula as text:
Pb3O4
Molar/atomic mass: 685.6
Melting point (°C):
830
Decomposition temperature (°C):
550
Solubility (g/100 g of solvent):
water
: insoluble [
Ref.
]
Density:
8.79 (20°C, g/cm
3
)
Reactions:
Yeild 70-77%. [
Ref.1
]
Pb
3
O
4
+ 8CH
3
COOH → Pb(CH
3
COO)
4
+ 2Pb(CH
3
COO)
2
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-723.4 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-606.2 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
211.3 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
146.9 (s)
References:
Иванова М.А., Кононова М.А. Химический демонстрационный эксперимент. - М.: Высшая школа, 1969. - pp. 36 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 95 [Russian]
Реми Г. Курс неорганической химии. - Т.1. - М., 1963. - pp. 593-594 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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