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Properties of substance:

tantalum(V) chloride

Group of substances:

inorganic

Physical appearance:

monoclinic crystals

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

Cl5Ta

Structural formula as text:

TaCl5

Molar/atomic mass: 358.21

Melting point (°C):

216.5

Boiling point (°C):

236

Solubility (g/100 g of solvent):

acetone: soluble [Ref.]
benzene: sparingly soluble [Ref.]
bromoethane: 7.66 (0°C) [Ref.]
bromoethane: 12 (20°C) [Ref.]
carbon disulphide: 1.017 (0°C) [Ref.]
carbon disulphide: 2.09 (14°C) [Ref.]
carbon disulphide: 2.47 (20°C) [Ref.]
carbon disulphide: 2.96 (25°C) [Ref.]
carbon tetrachloride: 0.245 (20°C) [Ref.]
carbon tetrachloride: 0.92 (30°C) [Ref.]
chloroform: 3.9 (0°C) [Ref.]
chloroform: 3.86 (20°C) [Ref.]
diethyl ether: sparingly soluble [Ref.]
ethanol: soluble [Ref.]
ethylenediamine: 1.48 (20°C) [Ref.]
nitrobenzene: 4.65 (20°C) [Ref.]
nitrobenzene: 4.74 (40°C) [Ref.]
water: reaction [Ref.]

Hygroscopic:

yes

Density:

3.68 (27°C, g/cm3)

Vapour pressure (Torr):

1 (117.6°C)
10 (150.5°C)
100 (190.4°C)

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

    -857.9 (s)

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

    -750.5 (s)

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

    238 (s)

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

    146 (s)

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

    34

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

    56.1

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

    -762 (g)

    LD50 (mg/kg):

    1900 (rats, oral)

    References:

    1. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 103 [Russian]
    2. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 957 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru