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Properties of substance:
phosphorus(V) fluoride
Group of substances:
inorganic
Physical appearance:
colorless gas
Empirical formula (Hill's system for organic substances):
F
5
P
Structural formula as text:
PF5
Molar/atomic mass: 125.97
Melting point (°C):
-93.7
Boiling point (°C):
-84.55
Solubility (g/100 g of solvent):
bromine trifluoride
: soluble [
Ref.
]
water
: reaction [
Ref.
]
Numerical data:
Year of discovery: 1876
Density:
0.005805 (0°C, g/cm
3
)
Reactions of synthesis:
[
Ref.1
]
10AsF
3
+ 3P
2
O
5
→ 6PF
5
+ 5As
2
O
3
Reactions:
[
Ref.1
]
LiF + PF
5
→ LiPF
6
Vapour pressure (Torr):
10 (-123°C)
100 (-106°C)
Dipole moment (D):
0 (20°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-1593 (g)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-1517.2 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
293 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
83.3 (g)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
11.9
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
17.2
References:
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 455 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 108 [Russian]
Фтор и его соединения. – Под ред. Саймонса Дж., Т. 1. - М.: ИИЛ, 1953. - pp. 87-88 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru