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Properties of substance:

lithium oxide

Group of substances:

inorganic

Physical appearance:

colorless cubic crystals

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

Li2O

Structural formula as text:

Li2O

Molar/atomic mass: 29.88

Melting point (°C):

1570

Boiling point (°C):

2600

Hygroscopic:

yes

Density:

2.013 (25°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1]
    Li2CO3 → Li2O + CO2
  2. [Ref.1]
    4Li + O2 → 2Li2O

Vapour pressure (Torr):

1 (955°C)
10 (1056°C)
100 (1175°C)

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

-595.8 (s)

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

-562.1 (s)

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

37.89 (s)

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

54.1 (s)

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

-166 (g)

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

43 (g)

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

233 (g)

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

50 (g)

References:

  1. Кулифеев В.К., Миклушевский В.В., Ватулин И.И. Литий. - М.: Мисис, 2006. - pp. 27-28 [Russian]
  2. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 229 [Russian]
  3. Остроушко Ю.И., Бучихин П.И. и др. Литий, его химия и технология. - М.: ИГУИАЭ, 1960. - pp. 44-45 [Russian]
  4. Плющев В.Е., Степин Б.Д. Химия и технология соединений лития, рубидия и цезия. - М.: Химия, 1970. - pp. 24-25 [Russian]
  5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 77 [Russian]
  6. Редкие и рассеянные элементы. Химия и технология. - Кн. 1. - М.: Мисис, 1996. - pp. 21-24 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru