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Properties of substance:

ammonium iodide

Group of substances:

inorganic

Physical appearance:

colorless cubic crystals

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

H4NI

Structural formula as text:

NH4I

Molar/atomic mass: 144.94

Sublimation point (°C):

405

Solubility (g/100 g of solvent):

acetic acid: sparingly soluble [Ref.]
acetone: very soluble [Ref.]
ammonia liquid : 334.6 (0°C) [Ref.]
ammonia liquid : 368.5 (25°C) [Ref.]
benzonitrile: sparingly soluble [Ref.]
diethyl ether: 0.48 [Ref.]
ethanol: 26.3 (25°C) [Ref.]
ethyl acetate: insoluble [Ref.]
glycerol: 52.9 [Ref.]
methanol: 50.6 [Ref.]
nickel tetracarbonyl: insoluble [Ref.]
sulfur dioxide: 8.39 (0°C) [Ref.]
thionyl chloride: soluble [Ref.]
tributyl phosphate: 12.7 (22°C) [Ref.]
water: 136 (-20°C) [Ref.]
water: 145 (-10°C) [Ref.]
water: 154.2 (0°C) [Ref.]
water: 163.2 (10°C) [Ref.]
water: 167.8 (15°C) [Ref.]
water: 172.3 (20°C) [Ref.]
water: 176.8 (25°C) [Ref.]
water: 181.4 (30°C) [Ref.]
water: 190.5 (40°C) [Ref.]
water: 199.6 (50°C) [Ref.]
water: 208.9 (60°C) [Ref.]
water: 218.7 (70°C) [Ref.]
water: 228.8 (80°C) [Ref.]
water: 250.3 (100°C) [Ref.]
water: 273.6 (120°C) [Ref.]

Hygroscopic:

yes

Density:

2.51 (20°C, g/cm3)

Vapour pressure (Torr):

100 (331°C)

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

-201 (s)

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

-112 (s)

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

117 (s)

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

81.76 (s)

References:

  1. Perry D.L. Handbook of Inorganic Compounds. - 2nd ed. - CRC Press, 2011. - pp. 28
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1099-1100
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 53 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 214, 743 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru