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Properties of substance:

calcium iodide

Group of substances:

inorganic

Physical appearance:

colorless hexagonal crystals

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

CaI2

Structural formula as text:

CaI2

Molar/atomic mass: 293.89

Melting point (°C):

575

Boiling point (°C):

718

Solubility (g/100 g of solvent):

acetone: 72.7 (0°C) [Ref.]
acetone: 89 (20°C) [Ref.]
acetone: 105.8 (40°C) [Ref.]
acetone: 119.8 (60°C) [Ref.]
ammonia liquid : 4 (0°C) [Ref.]
dimethylamine: very soluble [Ref.]
ethanol: soluble [Ref.]
ethyl acetate: soluble [Ref.]
iodine liquid: insoluble [Ref.]
methanol: 116.4 (0°C) [Ref.]
methanol: 121.1 (10°C) [Ref.]
methanol: 123.7 (15°C) [Ref.]
methanol: 126.1 (20°C) [Ref.]
methanol: 131.2 (30°C) [Ref.]
methanol: 136.8 (40°C) [Ref.]
methanol: 142.2 (50°C) [Ref.]
methanol: 148.8 (60°C) [Ref.]
sulfur dioxide: 0.76 (25°C) [Ref.]
water: 182 (0°C) [Ref.]
water: 194 (10°C) [Ref.]
water: 209 (20°C) [Ref.]
water: 223 (30°C) [Ref.]
water: 242 (40°C) [Ref.]
water: 285 (60°C) [Ref.]
water: 354 (80°C) [Ref.]
water: 426 (100°C) [Ref.]

Properties of solutions:

67,6% (wt.), solvent - water
  Density (g/cm3) = 2.125 (20°)

Hygroscopic:

yes

Density:

3.956 (25°C, g/cm3)

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

-534.7 (s)

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

-529.7 (s)

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

142 (s)

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

77 (s)

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

41.8

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

179

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

-261 (g)

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

326 (g)

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

60.8 (g)

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 298
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 71 [Russian]
  3. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 246, 785-786 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru