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Properties of substance:

sodium oxide

Group of substances:

inorganic

Physical appearance:

colorless cubic crystals

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

Na2O

Structural formula as text:

Na2O

Molar/atomic mass: 61.98

Sublimation point (°C):

1275

Solubility (g/100 g of solvent):

ethanol: reaction [Ref.]
water: reaction [Ref.]

Density:

2.27 (20°C, g/cm3)

Reactions:

  1. [Ref.1, Ref.2]
    2Na2O + H2 → 2NaOH + 2Na
  2. [Ref.1]
    Na2O + H2O → 2NaOH
  3. [Ref.1]
    4Na2O + 4S → 3Na2S + Na2SO4
  4. [Ref.1]
    Na2O + CO2 → Na2CO3
  5. [Ref.1]
    2Na2O + Cl2 → 2NaCl + Na2O2

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

-416 (s)

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

-377.1 (s)

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

75.27 (s)

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

72.95 (s)

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

-42 (g)

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

272 (g)

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

57 (g)

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

36

References:

  1. Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 88 [Russian]
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 84 [Russian]
  3. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 140-141 [Russian]
  4. Химическая технология неорганических веществ. - Кн.1, под ред. Ахметова Т.Г. - М.: Высшая школа, 2002. - pp. 7-8 [Russian]
  5. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 183 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru