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Properties of substance:
phosphorus(V) oxide
Group of substances:
inorganic
Physical appearance:
white trigonal crystals
Empirical formula (Hill's system for organic substances):
O
1
0
P
4
Structural formula as text:
P4O10
Molar/atomic mass: 283.89
Sublimation point (°C):
359
Solubility (g/100 g of solvent):
acetic acid
: insoluble [
Ref.
]
hydrogen fluoride
: reaction [
Ref.
]
sulfuric acid
: soluble [
Ref.
]
water
: reaction [
Ref.
]
Hygroscopic:
yes
Reactions:
[
Ref.1
]
10AsF
3
+ 3P
2
O
5
→ 6PF
5
+ 5As
2
O
3
[
Ref.1
]
P
2
O
5
+ 3H
2
O → 2H
3
PO
4
[
Ref.1
]
2HClO
4
+ P
2
O
5
→ Cl
2
O
7
+ 2HPO
3
Vapour pressure (Torr):
1 (190°C)
10 (237°C)
100 (295.5°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-2894 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
395 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
191 (g)
Standard molar enthalpy (heat) of formation Δ
f
H (298 K, kJ/mol)
-2984 (s) [
Ref.
]
Standard molar Gibbs energy of formation Δ
f
G (298 K, kJ/mol)
-2697.6 (s) [
Ref.
]
Standard molar entropy S (298 K, J/(mol·K))
228.9 (s) [
Ref.
]
Molar heat capacity at constant pressure C
p
(298 K, J/(mol·K))
211.7 (s) [
Ref.
]
Enthalpy (heat) of sublimation Δ
sub
H (kJ/mol)
65.3 (s) [
Ref.
]
References:
Везер В. Фосфор и его соединения. - М.: ИИЛ, 1962. - pp. 215-223 [Russian]
Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 131-132 [Russian]
Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 471-472 [Russian]
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 448 [Russian]
Постников Н.Н. Термическая фосфорная кислота. Химия и технология. - М.: Химия, 1970. - pp. 43-50 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 108 [Russian]
Реми Г. Курс неорганической химии. - Т.1. - М., 1963. - pp. 683 [Russian]
Химическая технология неорганических веществ. - Кн.1, под ред. Ахметова Т.Г. - М.: Высшая школа, 2002. - pp. 580-582, 683 [Russian]
Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 149-150 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru