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Properties of substance:
lithium hydride
Group of substances:
inorganic
Physical appearance:
colorless cubic crystals
Empirical formula (Hill's system for organic substances):
HLi
Structural formula as text:
LiH
Molar/atomic mass: 7.95
Melting point (°C):
680
Decomposition temperature (°C):
700
Solubility (g/100 g of solvent):
ammonia liquid
: reaction [
Ref.
]
diethyl ether
: sparingly soluble [
Ref.
]
dimethylformamide
: 0.7 (25°C) [
Ref.
]
ethanol
: reaction [
Ref.
]
water
: reaction [
Ref.
]
Density:
0.78 (25°C, g/cm
3
)
Reactions:
[
Ref.1
]
4LiH + AlCl
3
→ LiAlH
4
+ 3LiCl
[
Ref.1
]
2LiH + 2C → Li
2
C
2
+ H
2
Viscosity (mPa·s):
0.37 (677°C)
0.24 (851°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-90.65 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-68.48 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
20.03 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
27.99 (s)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
139 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
170.8 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
29.54 (g)
References:
Жигач А.Ф., Стасиневич Д.С. Химия гидридов. - Л.: Химия, 1969. - pp. 52-57 [Russian]
Кулифеев В.К., Миклушевский В.В., Ватулин И.И. Литий. - М.: Мисис, 2006. - pp. 24-27 [Russian]
Остроушко Ю.И., Бучихин П.И. и др. Литий, его химия и технология. - М.: ИГУИАЭ, 1960. - pp. 40-42 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 76 [Russian]
Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 607 [Russian]
Шпильрайн Э.Э., Якимович К.А. Гидрид лития. Физико-химические и теплофизические свойства. - М.: Издательство стандартов, 1972 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru