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Properties of substance:
tungsten
Group of substances:
inorganic
Physical appearance:
cubic metal
Empirical formula (Hill's system for organic substances):
W
Structural formula as text:
W
Molar/atomic mass: 183.85
Melting point (°C):
3420
Boiling point (°C):
5680
Solubility (g/100 g of solvent):
mercury
: 0.00001 (25°C) [
Ref.
]
water
: insoluble [
Ref.
]
Numerical data:
Year of discovery: 1781
Superconducting temperature (K): 0.015
Density:
19.32 (20°C, g/cm
3
)
Vapour pressure (Torr):
0.0000000079 (2130°C)
0.0000655 (2730°C)
0.01 (3230°C)
0.1 (3525°C)
1 (3875°C)
10 (4295°C)
100 (4810°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)):
32.7 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
24.3 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
61.5
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
769
References:
Dean J.A. Lange's handbook of chemistry. - 1999. - pp. 3.57
Бусев А.И., Иванов В.М., Соколова Т.А. Аналитическая химия вольфрама. - М.: Наука, 1976. - pp. 9-11 [Russian]
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 49-50 [Russian]
Зеликман А.Н., Никитина Л.С. Вольфрам. - М.: Металлургия, 1978. - pp. 17-31 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 59 [Russian]
Редкие и рассеянные элементы. Химия и технология. - Кн. 2. - М.: Мисис, 1998. - pp. 368-373 [Russian]
Фторидный процесс получения вольфрама. - М.: Наука, 1981. - pp. 5-27 [Russian]
Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 418-420 [Russian]
Химия и технология редких и рассеянных элементов. - Ч.3. - М.: Высшая школа, 1976. - pp. 222-223 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru