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Properties of substance:

cesium oxide

Group of substances:

inorganic

Physical appearance:

orange-red hexagonal crystals

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

Cs2O

Structural formula as text:

Cs2O

Molar/atomic mass: 281.91

Decomposition temperature (°C):

360

Solubility (g/100 g of solvent):

ammonia liquid : reaction [Ref.]
water: reaction [Ref.]

Density:

4.36 (20°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1aster, Ref.2aster]
    4Cs + O2 → 2Cs2O

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

-346 (s)

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

-274.5 (s)

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

146.9 (s)

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

76 (s)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

19

References:

  1. Плющев В.Е., Степин Б.Д. Химия и технология соединений лития, рубидия и цезия. - М.: Химия, 1970. - pp. 85-86 [Russian]
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 111 [Russian]
  3. Редкие и рассеянные элементы. Химия и технология. - Кн. 1. - М.: Мисис, 1996. - pp. 70-71 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru