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Properties of substance:

iodine pentafluoride

Group of substances:

inorganic

Physical appearance:

colorless liquid

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

F5I

Structural formula as text:

IF5

Molar/atomic mass: 221.9

Melting point (°C):

9.4

Boiling point (°C):

100

Solubility (g/100 g of solvent):

nitric acid: miscible [Ref.]

Numerical data:

Year of discovery: 1891

Density:

3.5 (20°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1, Ref.2]
    I2 + 5F2 → 2IF5

Vapour pressure (Torr):

1 (-15.2°C)
10 (8.8°C)
100 (51.4°C)

Dipole moment (D):

2.28 (20°C)

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

-834.3 (g)

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

-763.9 (g)

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

328.9 (g)

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

99.2 (g)

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

-876.1 (l)

Enthalpy (heat) of vaporization at boiling point ΔvapH (kJ/mol)

41.3 (l) [Ref.]

References:

  1. Simons J.H. Fluorine Chemistry. - Vol. 5. - New York: Academic Press, 1964. - pp. 89-90
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 65 [Russian]
  3. Рысс И.Г. Химия фтора и его неорганических соединений. - М., 1956. - pp. 141-143 [Russian]
  4. Фиалков Я.А. Межгалоидные соединения. - Киев: Издательство АН Украинской ССР, 1958. - pp. 83-98 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru