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Properties of substance:
platinum
Group of substances:
inorganic
Physical appearance:
cubic metal
Empirical formula (Hill's system for organic substances):
Pt
Structural formula as text:
Pt
Molar/atomic mass: 195.09
Melting point (°C):
1769
Boiling point (°C):
3800
Solubility (g/100 g of solvent):
gallium
: 4 (500°C) [
Ref.
]
mercury
: 0.0001 (20°C) [
Ref.
]
water
: insoluble [
Ref.
]
Density:
21.45 (20°C, g/cm
3
)
Reactions:
Yeild 75%. [
Ref.1
]
Pt + 3F
2
→ PtF
6
[
Ref.1
]
Pt + 3F
2
→ PtF
6
Vapour pressure (Torr):
0.01 (2049°C)
0.1 (2270°C)
1 (2530°C)
10 (2860°C)
100 (3270°C)
Electrode potential:
Pt
2+
+ e
-
→ Pt, E = 1.188 V (water, 25°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)):
41.5 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
25.9 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
19.7
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
510.4
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
566 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
192.3 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
25.5 (g)
References:
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
Левингстон С. Химия рутения, родия, палладия, осмия, иридия, платины. - М.: Мир, 1978 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 90 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 638 [Russian]
Токсикологическая химия. - Под ред. Плетеневой Т.В. - М.: ГЭОТАР-Медиа, 2005. - pp. 387 [Russian]
Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 568-569 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru