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Properties of substance:

phosphorus(III) iodide

Group of substances:

inorganic

Physical appearance:

hexagonal crystals

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

I3P

Structural formula as text:

PI3

Molar/atomic mass: 411.69

Melting point (°C):

61

Boiling point (°C):

200

Decomposition temperature (°C):

200

Solubility (g/100 g of solvent):

carbon disulphide: very soluble [Ref.]
water: reaction [Ref.]

Hygroscopic:

very hygroscopic

Density:

3.89 (20°C, g/cm3)

Vapour pressure (Torr):

10 (82°C)
100 (147°C)

Surface tension (mN/m):

56.5 (75°C)
51.4 (150°C)

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

-45.6 (s)

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

-44.8 (s)

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

192 (s)

References:

  1. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 454 [Russian]
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 108 [Russian]
  3. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 236-237 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru