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Properties of substance:

nitrogen(III) oxide

Synonyms:

dinitrogen trioxide
nitrous anhydride

Group of substances:

inorganic

Physical appearance:

gas

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

N2O3

Structural formula as text:

ONNO2

Molar/atomic mass: 76.01

Melting point (°C):

-101

Boiling point (°C):

3.5

Decomposition temperature (°C):

3.5

Solubility (g/100 g of solvent):

diethyl ether: soluble [Ref.]
water: soluble with reaction 56.3 (-33°C) [Ref.]

Numerical data:

Year of discovery: 1816

Density:

1.447 (2°C, g/cm3)

Reactions:

  1. [Ref.1]
    N2O3 → NO + NO2

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

83.3 (g)

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

307 (g)

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

65.3 (g)

Spectral properties of the substance:

Ultraviolet/visible spectrum (maximum in nm, layer thickness 1 cm, in parentheses - extinction) = 662 (20,1)

References:

  1. European Journal of Inorganic Chemistry. - 2017. - Vol. 2017, No. 46. - pp. 5461-5465 [DOI: 10.1002/ejic.201701091]
  2. Lowry, T. M., Lemon, J. T. 1. Properties of the oxides of nitrogen. Part II. The binary system N2O3–H2O. / Journal of the Chemical Society. - 1936. - pp. 1-6 [DOI: 10.1039/JR9360000001]
  3. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 226 [Russian]
  4. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 415-416, 423 [Russian]
  5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 50 [Russian]
  6. Справочник азотчика. - М.: Химия, 1987. - pp. 17-18 [Russian]
  7. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 12-13 [Russian]
  8. Энциклопедия для детей. - Т.17: Химия. - М.: Аванта+, 2004. - pp. 223 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru