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Properties of substance:

phosphorus(V) fluoride

Group of substances:

inorganic

Physical appearance:

colorless gas

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

F5P

Structural formula as text:

PF5

Molar/atomic mass: 125.97

Melting point (°C):

-93.7

Boiling point (°C):

-84.55

Solubility (g/100 g of solvent):

bromine trifluoride: soluble [Ref.]
water: reaction [Ref.]

Numerical data:

Year of discovery: 1876

Density:

0.005805 (0°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1]
    10AsF3 + 3P2O5 → 6PF5 + 5As2O3

Reactions:

  1. [Ref.1]
    LiF + PF5 → LiPF6

Vapour pressure (Torr):

10 (-123°C)
100 (-106°C)

Dipole moment (D):

0 (20°C)

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

-1593 (g)

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

-1517.2 (g)

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

293 (g)

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

83.3 (g)

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

11.9

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

17.2

References:

  1. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 455 [Russian]
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 108 [Russian]
  3. Фтор и его соединения. – Под ред. Саймонса Дж., Т. 1. - М.: ИИЛ, 1953. - pp. 87-88 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru