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Properties of substance:

potassium oxide

Group of substances:

inorganic

Physical appearance:

colorless cubic crystals

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

K2O

Structural formula as text:

K2O

Molar/atomic mass: 94.2

Decomposition temperature (°C):

300

Solubility (g/100 g of solvent):

diethyl ether: soluble [Ref.]
ethanol: soluble [Ref.]
water: reaction [Ref.]

Hygroscopic:

yes

Density:

2.32 (20°C, g/cm3)

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

    -363.2 (s)

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

    -322.1 (s)

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

    94.1 (s)

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

    83.7 (s)

    References:

    1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-83
    2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 69 [Russian]
    3. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 84-85 [Russian]
    4. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 233 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru