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Properties of substance:
сopper(I) sulfide
Group of substances:
inorganic
Physical appearance:
black rhombic crystals
Empirical formula (Hill's system for organic substances):
Cu
2
S
Structural formula as text:
Cu2S
Molar/atomic mass: 159.15
Melting point (°C):
1129
Solubility (g/100 g of solvent):
ethanol
: insoluble [
Ref.
]
water
: insoluble [
Ref.
]
Density:
5.6 (20°C, g/cm
3
)
Dissociation:
pK
sp
(0) = 48 (20°C, water)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-79.5 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-86.3 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
121 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
76.32 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
11.3
References:
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 496
Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 268 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 80-81 [Russian]
Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 5 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru