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Properties of substance:

sodium bromide dihydrate

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

H4BrNaO2

Structural formula as text:

NaBr * 2H2O

Molar/atomic mass: 138.92

Decomposition temperature (°C):

50

Solubility (g/100 g of solvent):

acetone: sparingly soluble [Ref.]
diethyl ether: 0.08 (15°C) [Ref.]
ethanol: 6.3 (15°C) [Ref.]
methanol: very soluble [Ref.]
water: 90.9 (15°C) [Ref.]

Density:

2.18 (20°C, g/cm3)

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

-951.9 (s)

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

-827.2 (s)

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

175.3 (s)

References:

  1. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 83 [Russian]
  2. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 658-659 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru