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Properties of substance:

mercury(I) bromide


Physical appearance:

colorless tetragonal crystals

Empirical formula (Hill's system):

Br2Hg2

Structural formula:

Hg2Br2

Molar/atomic mass: 560.99

Sublimation point (°C):

392.5

Solubility (g/100 g of solvent):

acetone: insoluble
water: 0.0000039 (25°C)
diethyl ether: insoluble
ethanol: insoluble

Density:

7.3 (20°C, g/cm3)

Vapour pressure (Torr):

0.1 (142.6°C)
1 (187.1°C)
10 (242.2°C)
100 (312.5°C)

    Dissociation:

    pПР (1) = 22.28 (25°C, water)

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

    -207.1 (s)

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

    -181.3 (s)

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

    217.7 (s)

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

    88.7 (s)

      References:

      1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 606
      2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 92
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        © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru