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Properties of substance:
cadmium
Group of substances:
inorganic
Physical appearance:
hexagonal metal
Empirical formula (Hill's system for organic substances):
Cd
Structural formula as text:
Cd
Molar/atomic mass: 112.4
Melting point (°C):
321
Boiling point (°C):
766.5
Solubility (g/100 g of solvent):
mercury
: 3.4 (0°C) [
Ref.
]
mercury
: 6.3 (20°C) [
Ref.
]
mercury
: 32.3 (100°C) [
Ref.
]
mercury
: 108.3 (200°C) [
Ref.
]
mercury
: 733.3 (300°C) [
Ref.
]
mercury
: miscible (322°C) [
Ref.
]
water
: insoluble [
Ref.
]
Numerical data:
Year of discovery: 1817
Superconducting temperature (K): 0.519
Hardness on the Mohs’ scale: 2
Density:
8.65 (20°C, g/cm
3
)
8 (321°C, d
4
)
7.99 (350°C, g/cm
3
)
7.93 (400°C, g/cm
3
)
7.72 (600°C, g/cm
3
)
Vapour pressure (Torr):
0.01 (265°C)
1 (394°C)
10 (488°C)
100 (615°C)
Electrode potential:
Cd
2+
+ e
-
→ Cd
+
, E = -1.8 V (water, 25°C)
Cd
2+
+ 2e
-
→ Cd, E = -0.403 V (water, 25°C)
Viscosity (mPa·s):
1.44 (349°C)
1.27 (466°C)
1.15 (550°C)
Surface tension (mN/m):
597 (400°C)
585 (600°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
0 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
0 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
51.76 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
26.02 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
6.23
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
99.6
References:
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 50 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 66 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 594 [Russian]
Успехи химии. - 1997. - Т.66, №2. - pp. 112 [Russian]
Щербов Д.П., Матвеец В.А. Аналитическая химия кадмия. - М.: Наука, 1973. - pp. 7-23 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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