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Properties of substance:

aluminum ammonium sulfate

Group of substances:

inorganic

Physical appearance:

colorless hexagonal crystals

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

H4AlNO8S2

Structural formula as text:

NH4Al(SO4)2

Molar/atomic mass: 237.15

Decomposition temperature (°C):

500

Solubility (g/100 g of solvent):

ethanol: insoluble [Ref.]
glycerol: soluble [Ref.]
water: 2.1 (0°C) [Ref.]
water: 26.7 (60°C) [Ref.]

Density:

2.039 (20°C, g/cm3)

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

-2352 (s)

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

-2038 (s)

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

216 (s)

References:

  1. Perry D.L. Handbook of Inorganic Compounds. - 2nd ed. - CRC Press, 2011. - pp. 3, 17
  2. Лидин Р.А., Андреева Л.Л., Молочко В.А. Константы неорганических веществ. - М.: Дрофа, 2006. - pp. 76 [Russian]
  3. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 18-19 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru