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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):

BaO2

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/cm3)

Reactions:

  1. [Ref.1aster, Ref.2aster]
    BaO2 + H2SO4 → BaSO4 + H2O2

Electrode potential:

BaO2 + 4H+ + 2e- → Ba2+ + 2H2O, E = 2.365 V (water, 25°C)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-629.7 (s)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

-587.9 (s)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

65.7 (s)

LD50 (mg/kg):

50 (mice, subcutaneous)

References:

  1. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 343-344
  2. Вольнов И.И. Перекисные соединения щелочноземельных металлов. - М.: Наука, 1983. - pp. 5-41 [Russian]
  3. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 171-172 [Russian]
  4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 55 [Russian]
  5. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 490 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru