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Properties of substance:
potassium nitrite
Group of substances:
inorganic
Physical appearance:
colorless monoclinic crystals
Empirical formula (Hill's system for organic substances):
KNO
2
Structural formula as text:
KNO2
Molar/atomic mass: 85.1
Melting point (°C):
387
Decomposition temperature (°C):
410
Solubility (g/100 g of solvent):
acetone
: insoluble [
Ref.
]
ammonia liquid
: soluble [
Ref.
]
ethanol
: soluble (78°C) [
Ref.
]
ethyl acetate
: insoluble [
Ref.
]
hydrogen fluoride
: reaction [
Ref.
]
methyl acetate
: insoluble [
Ref.
]
water
: 279.5 (0°C) [
Ref.
]
water
: 306.7 (20°C) [
Ref.
]
water
: 334.8 (40°C) [
Ref.
]
water
: 349.4 (60°C) [
Ref.
]
water
: 376 (80°C) [
Ref.
]
Hygroscopic:
yes
Density:
1.91 (20°C, g/cm
3
)
Reactions:
[
Ref.1
]
2KNO
2
→ K
2
O + NO + NO
2
Viscosity (mPa·s):
1.92 (427°C)
1.81 (447°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-370.6 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-281.6 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
152.1 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
107.4 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
17
References:
Comey A. M., Hahn D. A. A dictionary of Chemical Solubilities Inorganic. - 2 ed. - New York, The MacMillan Company, 1921. - pp. 627-628
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 831-832
Stern K.H. High temperature properties and thermal decomposition of inorganic salts with oxyanions. - CRC Press, 2001. - pp. 162
Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 114 [Russian]
Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 130-131 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 68 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 159-160 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 80-81 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru