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Properties of substance:

magnesium sulfate heptahydrate

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

H14MgO11S

Structural formula as text:

MgSO4 * 7H2O

Molar/atomic mass: 246.47

Decomposition temperature (°C):

150

Solubility (g/100 g of solvent):

ethanol: 1.3 (3°C) [Ref.]
glycerol: soluble [Ref.]
methanol: 29 (3°C) [Ref.]
methanol: 41 (17°C) [Ref.]
water: very soluble [Ref.]

Numerical data:

Critical relative humidity (%): 90.2

Density:

1.68 (20°C, g/cm3)

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

    -3384 (s)

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

    -2868 (s)

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

    393 (s)

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

    372 (s)

    References:

    1. Беликов В.Г. Учебное пособие по фармацевтической химии. - М.: Медицина, 1979. - pp. 52 [Russian]
    2. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 121 [Russian]
    3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 78 [Russian]
    4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 775 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru