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Properties of substance:

iron

Group of substances:

inorganic

Physical appearance:

cubic metal

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

Fe

Structural formula as text:

Fe

Molar/atomic mass: 55.85

Melting point (°C):

1539

Boiling point (°C):

2870

Solubility (g/100 g of solvent):

diethyl ether: insoluble [Ref.]
ethanol: insoluble [Ref.]
lithium molten: 0.002 (700°C) [Ref.]
magnesium fused: 0.05 (700°C) [Ref.]
magnesium fused: 0.265 (1000°C) [Ref.]
mercury: 0.0000015 (25°C) [Ref.]
mercury: 0.0000019 (100°C) [Ref.]
mercury: 0.0000054 (300°C) [Ref.]
potassium fused: 0.0045 (700°C) [Ref.]
sodium fused: 0.0005 (700°C) [Ref.]
tin liquid: 0.0047 (270°C) [Ref.]
tin liquid: 0.0073 (329°C) [Ref.]
tin liquid: 0.07 (483°C) [Ref.]
tin liquid: 1.26 (773°C) [Ref.]
tin liquid: 12.49 (1125°C) [Ref.]
water: insoluble [Ref.]

Numerical data:

Hardness on the Mohs’ scale: 4-5

Density:

7.874 (20°C, g/cm3)
6.9 (1589°C, d4)

Vapour pressure (Torr):

0.000000001 (799°C)
0.00000001 (858°C)
0.0000001 (924°C)
0.000001 (998°C)
0.00001 (1083°C)
0.0001 (1180°C)
0.001 (1293°C)
0.01 (1425°C)
0.1 (1586°C)
1 (1790°C)
10 (2045°C)
100 (2376°C)

    Electrode potential:

    Fe2+ + 2e- → Fe, E = -0.44 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)):

    27.15 (s)

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

    25 (s)

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

    13.8

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

    350

    LD50 (mg/kg):

    98600 (rats, oral)

    References:

    1. Авцын А.П., Жаворонков А.А., Риш М.А., Строчкова Л.С. Микроэлементозы человека. - М.: Медицина, 1991. - pp. 92-116 [Russian]
    2. Гринвуд Н., Эрншо А. Химия элементов. - Т.2. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 400-409 [Russian]
    3. Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 50 [Russian]
    4. Иванова М.А., Кононова М.А. Химический демонстрационный эксперимент. - М.: Высшая школа, 1969. - pp. 30 [Russian]
    5. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 325-334, 342 [Russian]
    6. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 62 [Russian]
    7. Реми Г. Курс неорганической химии. - Т.2. - М., 1966. - pp. 280-288 [Russian]
    8. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 637 [Russian]
    9. Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 139-141 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru