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Properties of substance:

sodium sulfate decahydrate

Synonyms:

sodium sulphate decahydrate

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

H20Na2O14S

Structural formula as text:

Na2SO4 * 10H2O

Molar/atomic mass: 322.19

Melting point (°C):

32.4

Decomposition temperature (°C):

32.4

Solubility (g/100 g of solvent):

ethanol: insoluble [Ref.]
glycerol 95%: 7.52 (25°C) [Ref.]
water: 12.17 (0°C) [Ref.]
water: 26.38 (11.67°C) [Ref.]
water: 31.33 (13.3°C) [Ref.]
water: 48.28 (17.91°C) [Ref.]
water: 99.48 (25.05°C) [Ref.]
water: 161.53 (28.76°C) [Ref.]
water: 215.77 (30.75°C) [Ref.]
water: 270.22 (31.84°C) [Ref.]
water: 322.12 (32.73°C) [Ref.]
water: 312.11 (33.88°C) [Ref.]
water: 276.91 (47.81°C) [Ref.]
water: 291.44 (48.78°C) [Ref.]
water: 262.35 (50.4°C) [Ref.]

Density:

1.46 (20°C, g/cm3)

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

-4329.7 (s) [Ref.]

Standard molar Gibbs energy of formation ΔfG (298 K, kJ/mol)

-3647 (s) [Ref.]

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

592 (s) [Ref.]

Molar heat capacity at constant pressure Cp (298 K, J/(mol·K))

549.5 (s) [Ref.]

Enthalpy (heat) of fusion ΔfusH (kJ/mol)

79 (s) [Ref.]

Enthalpy (heat) of solution ΔsolH (kJ)

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

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1314
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 85 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru