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Properties of substance:

oxirane

Synonyms:

ethylene oxide

Group of substances:

organic

Physical appearance:

colorless gas

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

C2H4O

Molar/atomic mass: 44.05

Melting point (°C):

-111.7

Boiling point (°C):

10.73

Decomposition temperature (°C):

400

Solubility (g/100 g of solvent):

acetone: very soluble [Ref.]
carbon tetrachloride: very soluble [Ref.]
chloroform: very soluble [Ref.]
diethyl ether: very soluble [Ref.]
ethanol: very soluble [Ref.]
water: 68.9 (10°C) [Ref.]

Numerical data:

Interatomic distances (in pm): 146

Density:

0.8839 (10°C, g/cm3)

Refractive index (nD):

1.364 (7°C)

Vapour pressure (Torr):

19.5 (-57°C)
110.6 (-30.4°C)
257.6 (-14.6°C)
493.1 (0°C)
768 (11°C)
824.8 (12.8°C)

    Permittivity (dielectric constant):

    13.9 (-1°C)

    Dipole moment (D):

    1.89 (20°C)

    Viscosity (mPa·s):

    0.322 (0°C)

    Surface tension (mN/m):

    24.3 (20°C)
    26.39 (10°C)

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

    -51 (g)

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

    -11.67 (g)

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

    243.1 (g)

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

    48.1 (g)

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

    5.17

    Autoignition temperature (°C):

    429

    Heat of combustion (kJ/mol):

    1264

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

    -78 (l)

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

    -11.8 (l)

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

    153.9 (l)

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

    88 (l)

    Critical temperature (°C):

    195.78

    Critical pressure (MPa):

    7.19

    References:

    1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-22
    2. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 100-101
    3. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 559 [Russian]
    4. Окись этилена. - М.: Химия, 1967 [Russian]
    5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 169 [Russian]
    6. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 381-382 [Russian]
    7. Хёрд Ч.Д. Пиролиз соединений углерода. - Л.-М.: ГОНТИ РКТП СССР, 1938. - pp. 168 [Russian]
    8. Химия: справочное руководство. - Под ред. Гаврюченкова Ф.Г., Курочкиной М.И. и др. - Л.: Химия, 1975. - pp. 358 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru