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Properties of substance:

rhenium(VII) oxide

Physical appearance:

rhombic crystals

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

O7Re2

Structural formula as text:

Re2O7

Molar/atomic mass: 484.41

Melting point (°C):

301.5

Boiling point (°C):

359

Destruction point (°C):

600

Solubility (g/100 g of solvent):

acetone: soluble [Ref.]
water: very soluble [Ref.]
diethyl ether: sparingly soluble [Ref.]
methanol: soluble [Ref.]
pyridine: soluble [Ref.]
carbon tetrachloride: sparingly soluble [Ref.]
ethanol: very soluble [Ref.]

Hygroscopic:

yes

Density:

8.2 (20°C, g/cm3)

Vapour pressure (Torr):

0.1 (184°C)
1 (214.5°C)
10 (249.3°C)
100 (289.4°C)

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

    -1272 (s)

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

    -1098 (s)

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

    207.2 (s)

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

    166.2 (s)

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

    63.2

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

    69.9

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

    -1115 (g)

    References:

    1. Борисова Л.В., Ермаков Е.Н. Аналитическая химия рения. - М.: Наука, 1974. - pp. 20
    2. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 307-308
    3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 91
    4. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советсткая энциклопедия, 1983. - pp. 506
    5. Химия и технология редких и рассеянных элементов. - Ч.3. - М.: Высшая школа, 1976. - pp. 279-280
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru