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Properties of substance:

xenon trioxide



skc-file

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

Empirical formula (Hill's system for organic substances):

O3Xe

Structural formula as text:

XeO3

Molar/atomic mass: 179.3

Decomposition temperature (°C):

40

Interatomic distances and bond angles:

Interatomic distances (in pm): 174 (Xe-O(1)) [crystals]
Interatomic distances (in pm): 176 (Xe-O(2)) [crystals]
Interatomic distances (in pm): 177 (Xe-O(3)) [crystals]

Numerical data:

Critical relative humidity (%): 25

Not numerical data:

very hygroscopic

Reactions:

  1. [Ref.1]
    2XeO3 + 4NaOH → Na4XeO6 + Xe + O2 + 2H2O

Electrode potential:

XeO3 + 6H+ + 6e- → Xe + 3H2O, E = 1.8 V (water, 25°C)
H4XeO6 + 2H+ + 2e- → XeO3 + 3H2O, E = 2.42 V (water, 25°C)

Dissociation:

pKa (1) = 10.5 (25°C, water)

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

401.6 (g)

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

289 (g)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

62.3 (g)

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-98
  2. Progress in inorganic chemistry. - Vol. 29. - John Wiley & Sons, 1982. - pp. 198-199
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 75 [Russian]
  4. Разумовский С.Д. Кислород - элементарные формы и свойства. - М.: Химия, 1979. - pp. 148 [Russian]
  5. Успехи химии. - 1965. - Т.34, №6. - pp. 990-992 [Russian]
  6. Успехи химии. - 1974. - Т.43, №12. - pp. 2169-2170 [Russian]
  7. Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 548 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru