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Properties of substance:
nitrogen(II) oxide
Synonyms:
nitric oxide
Group of substances:
inorganic
Physical appearance:
colorless gas
Empirical formula (Hill's system for organic substances):
NO
Structural formula as text:
NO
Molar/atomic mass: 30.01
Melting point (°C):
-163.7
Boiling point (°C):
-151.7
Decomposition temperature (°C):
1100-1200
Solubility (g/100 g of solvent):
benzene
: 0.042 (24.6°C) [
Ref.
]
carbon disulphide
: soluble [
Ref.
]
carbon tetrachloride
: 0.027 (19.6°C) [
Ref.
]
dimethylsulfoxide
: insoluble [
Ref.
]
ethanol
: 0.036 (20°C) [
Ref.
]
nitrobenzene
: 0.02 (20°C) [
Ref.
]
sulfuric acid
: soluble [
Ref.
]
water
: 0.0069 (15°C) [
Ref.
]
water
: 0.0063 (20°C) [
Ref.
]
water
: 0.0058 (25°C) [
Ref.
]
water
: 0.00502 (35°C) [
Ref.
]
water
: 0.0035 (100°C) [
Ref.
]
Properties of solutions:
1% (wt.), solvent - nitrogen dioxide
Freezing point (°C) = -12.6
Boiling point (°C) = 18.
25% (wt.), solvent - nitrogen dioxide
Freezing point (°C) = -55.
Boiling point (°C) = 2.
Interatomic distances and bond angles:
Interatomic distances (in pm): 115 (N-O) [gas]
Numerical data:
Polarizability of molecules (nm
3
): 0.0018
Magnetic susceptibility (mm
3
/kg): 48.7
Density:
1.269 (-152°C, g/cm
3
)
0.0013402 (0°C, g/cm
3
)
Reactions of synthesis:
[
Ref.1
]
3Zn + 8HNO
3
(40%) → 3Zn(NO
3
)
2
+ 2NO + 4H
2
O
[
Ref.1
]
3Cu + 8HNO
3
(30%) + 14H
2
O → 3Cu(NO
3
)
2
* 6H
2
O + 2NO
[
Ref.1
]
N
2
+ O
2
→ 2NO
[
Ref.1
]
3Hg + 8HNO
3
(30%) → 3Hg(NO
3
)
2
+ 2NO + 4H
2
O
Reactions:
[
Ref.1
]
C
2
H
5
OOC
2
H
5
+ 2NO → 2C
2
H
5
ONO
[
Ref.1
]
2NO + O
2
→ 2NO
2
[
Ref.1
,
Ref.2
]
2NO + Cl
2
→ 2NOCl
Electrode potential:
2NO + 4H
+
+ 4e
-
→ N
2
+ 2H
2
O, E = 1.678 V (water, 25°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
90.25 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
210.6 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
29.9 (g)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
2.3
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
13.77
Critical temperature (°C):
-94
References:
Binneweis M., Milke E. Thermochemical Data of Elements and Compounds. - 2ed, 2002. - pp. 695
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1142-1144
Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 107-108 [Russian]
Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 416-418 [Russian]
Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 226 [Russian]
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 414, 419-421, 426-427 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 50 [Russian]
Реми Г. Курс неорганической химии. - Т.1. - М., 1963. - pp. 638-639 [Russian]
Справочник азотчика. - М.: Химия, 1987. - pp. 13-14 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 330, 921 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 12-13 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru