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Properties of substance:

sodium amide

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

H2NNa

Structural formula as text:

NaNH2

Molar/atomic mass: 39.01

Melting point (°C):

210

Boiling point (°C):

400

Decomposition temperature (°C):

500-600

Solubility (g/100 g of solvent):

ammonia liquid : 0.13 (-10°C) [Ref.]
ammonia liquid : 0.004 (25°C) [Ref.]
ethanol: reaction [Ref.]
water: reaction [Ref.]

Density:

1.39 (25°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1aster, Ref.2, Ref.3aster, Ref.4aster, Ref.5aster]
    2Na + 2NH3 → 2NaNH2 + H2
  2. [Ref.1aster]
    2Na + 2NH3 → 2NaNH2 + H2

Reactions:

  1. Yeild 60%. [Ref.1aster]
    NaNO3 + 3NaNH2 → NaN3 + 3NaOH + NH3
  2. [Ref.1]
    NaNH2 + H2O → NaOH + NH3

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

-118.8 (s)

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

-59 (s)

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

76.9 (s)

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

66.15 (s)

References:

  1. Inorganic Syntheses. - Vol. 1. - New York and London, 1939. - pp. 74-77
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1146
  3. Багал Л.И. Химия и технология инициирующих взрывчатых веществ. - М., 1975. - pp. 184-189 [Russian]
  4. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 162-163 [Russian]
  5. Краткая химическая энциклопедия. - Т. 3: Мальтаза-Пиролиз. - М.: Советская энциклопедия, 1964. - pp. 371 [Russian]
  6. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 83 [Russian]
  7. Ситтиг М. Натрий, его производство, свойства и применение. - М.: ГИЛОАНТ, 1961. - pp. 209-217 [Russian]
  8. Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 128 [Russian]
  9. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 361 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru