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Properties of substance:

potassium pyrophosphate trihydrate

Group of substances:

inorganic

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

H6K4O10P2

Structural formula as text:

K4P2O7 * 3H2O

Molar/atomic mass: 384.382

Decomposition temperature (°C):

180-300

Solubility (g/100 g of solvent):

ethanol: insoluble [Ref.]
water: soluble [Ref.]

Hygroscopic:

yes

Density:

2.33 (20°C, g/cm3)

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

-4110 (s)

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

444 (s)

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

372 (s)

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-83
  2. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 132-133 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru