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Properties of substance:

potassium pyrosulfate

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

K2O7S2

Structural formula as text:

K2S2O7

Molar/atomic mass: 254.32

Melting point (°C):

417

Decomposition temperature (°C):

470

Solubility (g/100 g of solvent):

water: soluble [Ref.]

Density:

2.51 (25°C, g/cm3)

Standard molar enthalpy (heat) of formation ΔfH (298 K, kJ/mol)

-1987 (s) [Ref.]

Standard molar entropy S (298 K, J/(mol·K))

255 (s) [Ref.]

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-83
  2. Бок Р. Методы разложения в аналитической химии. - М.: Химия, 1984. - pp. 86 [Russian]
  3. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 132-133 [Russian]
  4. Успехи химии. - 1965. - Т.34, №12. - pp. 2119-2120 [Russian]
  5. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 234 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru