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Properties of substance:

iridium(IV) oxide

Group of substances:

inorganic

Physical appearance:

black tetragonal crystals

Empirical formula (Hill's system for organic substances):

IrO2

Structural formula as text:

IrO2

Molar/atomic mass: 224.22

Decomposition temperature (°C):

1100

Solubility (g/100 g of solvent):

ethanol: insoluble [Ref.]
water: 0.0002 (20°C) [Ref.]
water: 0.00002 (30°C) [Ref.]

Density:

3.15 (20°C, g/cm3)

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

-243 (s)

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

-188.4 (s)

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

59 (s)

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

57.3 (s)

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 682
  2. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 404 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 66 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru