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Properties of substance:

pentaborane(9)

Group of substances:

inorganic

Physical appearance:

colorless volatile liquid

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

H9B5

Structural formula as text:

B5H9

Molar/atomic mass: 63.13

Melting point (°C):

-46.8

Boiling point (°C):

60

Decomposition temperature (°C):

150

Solubility (g/100 g of solvent):

carbon disulphide: miscible [Ref.]

Permittivity (dielectric constant):

21 (25°C)

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

45 (l)

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

184.2 (l)

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

151.1 (l)

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

28.9

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

76 (g)

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

275.7 (g)

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

95.4 (g)

References:

  1. The Merck Index 11th ed., Merck & Company, 1989. - pp. 1126
  2. Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 161, 167 [Russian]
  3. Жигач А.Ф., Стасиневич Д.С. Химия гидридов. - Л.: Химия, 1969. - pp. 289-300 [Russian]
  4. Зрелов В.Н., Серегин Е.П. Жидкие ракетные топлива. - М.: Химия, 1975. - pp. 164-166 [Russian]
  5. Карапетьянц М.Х., Дракин С.И. Общая и неорганическая химия. - М.: Химия, 1981. - pp. 349 [Russian]
  6. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 20-21 [Russian]
  7. Успехи химии. - 1966. - Т.35, №8. - pp. 1359-1369 [Russian]
  8. Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 307 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru