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Properties of substance:

deuterium

Group of substances:

inorganic

Physical appearance:

colorless gas

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

H2

Structural formula as text:

D2

Molar/atomic mass: 4.03

Melting point (°C):

-254.42

Boiling point (°C):

-249.55

Solubility (g/100 g of solvent):

perfluoro-n-heptane: 0.001097 (-25°C) [Ref.]
perfluoro-n-heptane: 0.00129 (0°C) [Ref.]
perfluoro-n-heptane: 0.0015 (25°C) [Ref.]
perfluoro-n-heptane: 0.001594 (35°C) [Ref.]
water: sparingly soluble [Ref.]

Vapour pressure (Torr):

1 (-260.9°C)
10 (-258.4°C)
100 (-254.9°C)

Permittivity (dielectric constant):

1.00025 (20°C)

Speed sound (m/s):

890 (0°C, aggregative state - gas)

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

0 (g)

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

0 (g)

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

144.86 (g)

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

29.2 (g)

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

0.197

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

1.33

Enthalpy (heat) of dissociation ΔdissH (kJ/mol)

443.35 (g) [Ref.]

Critical temperature (°C):

-234.8

Critical pressure (MPa):

1.665

Critical density (g/cm3):

0.0623

References:

  1. Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 42-43, 46 [Russian]
  2. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 542 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 59 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru