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Properties of substance:
mercury(II) iodide
Group of substances:
inorganic
Physical appearance:
red tetragonal crystals
Empirical formula (Hill's system for organic substances):
HgI
2
Structural formula as text:
HgI2
Molar/atomic mass: 454.4
Melting point (°C):
259
Boiling point (°C):
353
Solubility (g/100 g of solvent):
1,2-dibromoethane
: 0.748 (20°C) [
Ref.
]
1,2-dichloroethane
: 1.2 (85.5°C) [
Ref.
]
1,4-dioxane
: soluble [
Ref.
]
1-pentanol
: 0.66 (13°C) [
Ref.
]
1-pentanol
: 3.66 (71°C) [
Ref.
]
1-propanol
: 1.25 (19°C) [
Ref.
]
2-propanol
: 2.266 (81°C) [
Ref.
]
acetic acid
: 0.083 (31°C) [
Ref.
]
acetic acid
: 0.159 (47°C) [
Ref.
]
acetic acid
: 0.49 (76°C) [
Ref.
]
acetic acid
: 1.45 (110°C) [
Ref.
]
acetone
: 2.1 (25°C) [
Ref.
]
acetone
: 4.73 (40°C) [
Ref.
]
acetone
: 6.07 (58°C) [
Ref.
]
aniline
: 42.85 (17.8°C) [
Ref.
]
aniline
: 96.49 (42.9°C) [
Ref.
]
antimony trichloride
: very soluble [
Ref.
]
benzene
: 0.22 (15°C) [
Ref.
]
benzene
: 0.25 (23°C) [
Ref.
]
benzene
: 0.88 (60°C) [
Ref.
]
bromoethane
: 0.643 (20°C) [
Ref.
]
bromoethane
: 0.773 (38°C) [
Ref.
]
bromoform
: 0.486 (20°C) [
Ref.
]
carbon disulphide
: 0.107 (-10°C) [
Ref.
]
carbon disulphide
: 0.173 (0°C) [
Ref.
]
carbon disulphide
: 0.32 (20°C) [
Ref.
]
carbon disulphide
: 0.447 (30°C) [
Ref.
]
carbon tetrachloride
: 0.017 (18°C) [
Ref.
]
carbon tetrachloride
: 0.094 (75°C) [
Ref.
]
chloroform
: 0.07 (23°C) [
Ref.
]
chloroform
: 0.163 (61°C) [
Ref.
]
diethyl ether
: 0.62 (0°C) [
Ref.
]
diethyl ether
: 0.97 (36°C) [
Ref.
]
dimethylamine
: very soluble [
Ref.
]
dimethylsulfoxide
: 100 [
Ref.
]
ethanol
: 1.48 (18°C) [
Ref.
]
ethanol
: 2.19 (25°C) [
Ref.
]
ethanol
: 4.325 (78°C) [
Ref.
]
ethyl acetate
: 1.56 (17.5°C) [
Ref.
]
ethyl acetate
: 1.64 (21°C) [
Ref.
]
ethyl acetate
: 3.19 (55°C) [
Ref.
]
ethyl acetate
: 4.31 (76°C) [
Ref.
]
ethyl formane
: 2.15 (55°C) [
Ref.
]
glycerol
: soluble [
Ref.
]
hexane
: 0.072 (67°C) [
Ref.
]
hydrazine
: reaction 69 (20°C) [
Ref.
]
i-butanol
: 0.51 (22.5°C) [
Ref.
]
iodine liquid
: soluble [
Ref.
]
iodoethane
: 2.041 (20°C) [
Ref.
]
methanol
: 3.16 (19.5°C) [
Ref.
]
methanol
: 3.98 (23°C) [
Ref.
]
methanol
: 6.51 (66°C) [
Ref.
]
methyl acetate
: 2.5 (58°C) [
Ref.
]
methyl formate
: 1.166 (37°C) [
Ref.
]
methylamine
: very soluble [
Ref.
]
methylene iodide
: 2.5 (15°C) [
Ref.
]
methylene iodide
: 16.6 (100°C) [
Ref.
]
methylene iodide
: 58 (180°C) [
Ref.
]
pyridine
: 17.4 (-0.1°C) [
Ref.
]
pyridine
: 32.3 (20.02°C) [
Ref.
]
pyridine
: 93.39 (60.07°C) [
Ref.
]
sulfur dioxide
: 0.012 (0°C) [
Ref.
]
trimethylamine
: soluble [
Ref.
]
water
: 0.004 (17.5°C) [
Ref.
]
water
: 0.0054 (22°C) [
Ref.
]
Multicomponent solubility (in wt%):
water 29.8%, potassium iodide 50.9%, mercury(II) iodide 19.3%, 20 °C, separating phase:
KI
[
Ref.
]
water 13.%, potassium iodide 39.%, mercury(II) iodide 48.%, 20 °C, separating phase:
KI
[
Ref.
]
water 9.%, potassium iodide 37.4%, mercury(II) iodide 53.6%, 20 °C, separating phase:
K2HgI4
[
Ref.
]
water 9.6%, potassium iodide 37.8%, mercury(II) iodide 52.6%, 20 °C, separating phase:
KHgI3
[
Ref.
]
water 13.3%, potassium iodide 35.5%, mercury(II) iodide 51.2%, 20 °C, separating phase:
KHgI3 * H2O
[
Ref.
]
Density:
6.36 (20°C, g/cm
3
)
Vapour pressure (Torr):
0.000001 (4.2°C)
0.00001 (21.3°C)
0.0001 (40.8°C)
0.001 (62.8°C)
0.01 (89°C)
1 (156°C)
10 (203°C)
100 (262°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-105.4 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-103.05 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
184.05 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
78.2 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
18.8
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
60.2
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-15.9 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
329 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
61.1 (g)
References:
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 640-648
Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 196-197 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 92 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 295, 834-839 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru