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Properties of substance:

krypton

Physical appearance:

colorless gas

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

Kr

Structural formula as text:

Kr

Molar/atomic mass: 83.8

Melting point (°C):

-157.37

Boiling point (°C):

-153.22

Solubility (g/100 g of solvent):

benzene: 0.282 (19°C) [Ref.]
water: 0.041 (0°C) [Ref.]
water: 0.022 (25°C) [Ref.]
water: 0.017 (50°C) [Ref.]
toluene: 0.358 (18°C) [Ref.]
ethanol 96%: 0.239 (19°C) [Ref.]

Numerical data:

Year of discovery: 1898
Ionization Potentials (Electronvolts): 14

Density:

0.003708 (20°C, g/cm3)
2.155 (-153.2°C, g/cm3)

Vapour pressure (Torr):

1 (-198.3°C)
10 (-187.2°C)
100 (-172.4°C)

    Permittivity (dielectric constant):

    1.000768 (25°C)

    Speed sound (m/s):

    224.4 (30.3°C, aggregative state - gas)

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

    0 (g)

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

    0 (g)

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

    163.97 (g)

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

    20.79 (g)

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

    1.64

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

    9.05

    Critical temperature (°C):

    -63.77

    Critical pressure (MPa):

    5.5

    Critical density (g/cm3):

    0.908

    References:

    1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 886
    2. Вредные химические вещества: Неорганические соединения элементов V-VIII групп. Справочник. - Л., 1989. - pp. 537
    3. Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51
    4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 25, 75
    5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 583-586
    6. Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 523
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru