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Properties of substance:

nitrogen trifluoride

Group of substances:

inorganic

Physical appearance:

colorless gas

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

F3N

Structural formula as text:

NF3

Molar/atomic mass: 71.002

Melting point (°C):

-206.79

Boiling point (°C):

-129.06

Solubility (g/100 g of solvent):

water: insoluble [Ref.]

Numerical data:

Year of discovery: 1928

Density:

1.76 (-208.5°C, g/cm3)
1.532 (-129.06°C, g/cm3)

Reactions of synthesis:

  1. Yeild 70%. [Ref.1]
    NH4F + 3F2 → NF3 + 4HF
  2. Yeild 30%. [Ref.1]
    N2 + 3F2 → 2NF3
  3. [Ref.1, Ref.2]
    2NH3 + 3F2 → N2 + 6HF

Vapour pressure (Torr):

10 (-171°C)
100 (-153°C)

Dipole moment (D):

0.24 (20°C)

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

-126 (g)

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

-84.4 (g)

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

260.6 (g)

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

53.26 (g)

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

0.4

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

11.6

Critical temperature (°C):

-39.25

Critical pressure (MPa):

4.531

References:

  1. Chemical Reviews. - 1962. - Vol. 62, No. 1. - pp. 2-4
  2. Nakajima T., Zemva B., Tressaud A. Advanced inorganic fluorides: Syntesis, Characterization and Applications. - Elsevier, 2000. - pp. 630
  3. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 100 [Russian]
  4. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 401 [Russian]
  5. Панкратов А.В. Химия фторидов азота. - М.: Химия, 1973 [Russian]
  6. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 50 [Russian]
  7. Токсикологический вестник. - 2001. - №2. - pp. 37-38 [Russian]
  8. Фтор и его соединения. – Под ред. Саймонса Дж., Т. 1. - М.: ИИЛ, 1953. - pp. 76-78 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru