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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/cm3)

Reactions:

  1. Yeild 75%. [Ref.1]
    Pt + 3F2 → PtF6
  2. [Ref.1]
    Pt + 3F2 → PtF6

Vapour pressure (Torr):

0.01 (2049°C)
0.1 (2270°C)
1 (2530°C)
10 (2860°C)
100 (3270°C)

Electrode potential:

Pt2+ + e- → Pt, E = 1.188 V (water, 25°C)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

0 (s)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

0 (s)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

41.5 (s)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

25.9 (s)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

19.7

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

510.4

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

566 (g)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

192.3 (g)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

25.5 (g)

References:

  1. Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
  2. Левингстон С. Химия рутения, родия, палладия, осмия, иридия, платины. - М.: Мир, 1978 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 90 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 638 [Russian]
  5. Токсикологическая химия. - Под ред. Плетеневой Т.В. - М.: ГЭОТАР-Медиа, 2005. - pp. 387 [Russian]
  6. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 568-569 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru