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Properties of substance:
potassium azide
skc-file
Group of substances:
inorganic
Physical appearance:
colorless tetragonal crystals
Empirical formula (Hill's system for organic substances):
KN
3
Structural formula as text:
KN3
Molar/atomic mass: 81.12
Melting point (°C):
354
Decomposition temperature (°C):
360
Solubility (g/100 g of solvent):
acetone
: insoluble [
Ref.
]
ammonia liquid
: very soluble [
Ref.
]
benzene
: 0.15 (80°C) [
Ref.
]
diethyl ether
: slightly soluble [
Ref.
]
ethanol
: 0.16 (0°C) [
Ref.
]
ethanol
: 0.137 (16°C) [
Ref.
]
ethanol 80%
: 1.83 (0°C) [
Ref.
]
ethanol 80%
: 5.93 (78.4°C) [
Ref.
]
methanol
: very soluble [
Ref.
]
water
: 41.4 (0°C) [
Ref.
]
water
: 46.5 (10.5°C) [
Ref.
]
water
: 48.9 (15.5°C) [
Ref.
]
water
: 49.6 (17°C) [
Ref.
]
water
: 105.7 (100°C) [
Ref.
]
Hygroscopic:
no
Numerical data:
Year of discovery: 1898
Density:
2.056 (20°C, g/cm
3
)
Reactions of synthesis:
[
Ref.1
]
HN
3
+ KOH → KN
3
+ H
2
O
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-1.7 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
104 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
76.9 (s)
References:
CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-82
Inorganic Syntheses. - Vol. 1. - New York and London, 1939. - pp. 79-81
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 831
Багал Л.И. Химия и технология инициирующих взрывчатых веществ. - М., 1975. - pp. 158-159 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 159, 696-697 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 80-81 [Russian]
Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 285 [Russian]
Энергетические конденсированные системы. - Под ред. Жукова Б.П., 2-е изд. - М.: Янус-К, 2000. - pp. 19 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru