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Properties of substance:

sodium sulfite heptahydrate

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

H14Na2O10S

Structural formula as text:

Na2SO3 * 7H2O

Molar/atomic mass: 252.15

Decomposition temperature (°C):

150

Solubility (g/100 g of solvent):

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

Density:

1.54 (15°C, g/cm3)

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

-3153 (s)

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

450 (s)

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

420 (s)

References:

  1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 166-167 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru