Main page (Russian) Search in database (English)

Properties of substance:

mercury(II) sulfide

Group of substances:

inorganic

Physical appearance:

red trigonal crystals

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

HgS

Structural formula as text:

HgS

Molar/atomic mass: 232.65

Melting point (°C):

825

Solubility (g/100 g of solvent):

ethanol: insoluble [Ref.]
water: 0.00000125 (18°C) [Ref.]

Density:

8.1 (20°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1aster]
    (CH3COO)2Hg + H2S → HgS + 2CH3COOH

Vapour pressure (Torr):

1 (333°C)
10 (395°C)
100 (484°C)

Electrode potential:

HgS + 2e- → Hg + S2-, E = -0.7 V (water, 25°C)

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

-59 (s)

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

-51.4 (s)

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

82.4 (s)

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

48.41 (s)

References:

  1. Inorganic Syntheses. - Vol. 1. - New York and London, 1939. - pp. 19-20
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 652
  3. Иванова М.А., Кононова М.А. Химический демонстрационный эксперимент. - М.: Высшая школа, 1969. - pp. 36 [Russian]
  4. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 204 [Russian]
  5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 93 [Russian]
  6. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 512 [Russian]
  7. Энциклопедия для детей. - Т.17: Химия. - М.: Аванта+, 2004. - pp. 235 [Russian]

    What information do you need?




    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru