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Properties of substance:

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

H2MgO5S

Structural formula as text:

MgSO4 * H2O

Molar/atomic mass: 138.38

Decomposition temperature (°C):

200

Solubility (g/100 g of solvent):

water: very soluble [Ref.]

Density:

2.44 (20°C, g/cm3)

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

-1610.4 (s)

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

126 (s)

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

134 (s)

Enthalpy (heat) of solution ΔsolH (kJ)

-55.7 (s) [solvent: water, 18°C, 1 mol in 400 mol of water] [Ref.]

References:

  1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 152-153 [Russian]
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 78 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru