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Properties of substance:

magnesium iodide

Group of substances:

inorganic

Physical appearance:

colorless trigonal crystals

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

I2Mg

Structural formula as text:

MgI2

Molar/atomic mass: 278.11

Melting point (°C):

633

Boiling point (°C):

1014

Solubility (g/100 g of solvent):

acetic acid: 0.26 (20°C) [Ref.]
acetic acid: 0.88 (40°C) [Ref.]
acetic acid: 2.25 (60°C) [Ref.]
acetic acid: 8.8 (80°C) [Ref.]
acetic acid: 26.7 (100°C) [Ref.]
acetone: 2.25 (0°C) [Ref.]
acetone: 2.8 (20°C) [Ref.]
acetone: 3.4 (40°C) [Ref.]
acetone: 4.7 (60°C) [Ref.]
ammonia liquid : 0.16 (0°C) [Ref.]
diethyl ether: 1.47 (5.4°C) [Ref.]
diethyl ether: 2.49 (11.8°C) [Ref.]
diethyl ether: 8.17 (20.4°C) [Ref.]
diethyl ether: 12.71 (22.2°C) [Ref.]
ethanol: 12.4 (0°C) [Ref.]
ethanol: 20.1 (20°C) [Ref.]
ethanol: 28.7 (40°C) [Ref.]
ethanol: 38.3 (60°C) [Ref.]
methanol: 41.5 (0°C) [Ref.]
methanol: 45.1 (20°C) [Ref.]
methanol: 48.6 (40°C) [Ref.]
methanol: 52.2 (60°C) [Ref.]
sulfur dioxide: 0.014 (0°C) [Ref.]
water: 120.8 (0°C) [Ref.]
water: 139.8 (20°C) [Ref.]
water: 173.2 (40°C) [Ref.]
water: 187.5 (80°C) [Ref.]
water: 189 (120°C) [Ref.]

Properties of solutions:

55% (wt.), solvent - water
  Density (g/cm3) = 1.776 (20°)

Hygroscopic:

yes

Density:

4.25 (20°C, g/cm3)

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

-364 (s)

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

134 (s)

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

74 (s)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

26

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

151

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

-160 (g)

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

314 (g)

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

59.4 (g)

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 971
  2. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 150-151 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 78 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 235 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru