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Properties of substance:
molybdenum(VI) oxide
Group of substances:
inorganic
Physical appearance:
colorless rhombic crystals
Empirical formula (Hill's system for organic substances):
MoO
3
Structural formula as text:
MoO3
Molar/atomic mass: 143.94
Melting point (°C):
801
Boiling point (°C):
1155
Solubility (g/100 g of solvent):
hydrogen fluoride
: reaction [
Ref.
]
water
: 0.1066 (18°C) [
Ref.
]
water
: 0.1856 (23°C) [
Ref.
]
water
: 0.2638 (30°C) [
Ref.
]
water
: 0.7855 (54°C) [
Ref.
]
water
: 1.2057 (60°C) [
Ref.
]
water
: 2.055 (70°C) [
Ref.
]
water
: 2.1064 (79°C) [
Ref.
]
Density:
4.69 (20°C, g/cm
3
)
Reactions:
[
Ref.1
]
MoO
3
+ 3H
2
→ Mo + 3H
2
O
Vapour pressure (Torr):
1 (734°C)
10 (797°C)
100 (954°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-745.2 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-668.1 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
77.74 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
75.02 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
49
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
138
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-363 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
279 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
59 (g)
References:
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1015
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 81 [Russian]
Реми Г. Курс неорганической химии. - Т.2. - М., 1966. - pp. 186 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 342 [Russian]
Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 128 [Russian]
Химия и технология редких и рассеянных элементов. - Ч. 3. - М.: Высшая школа, 1976. - pp. 162-165 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru