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Properties of substance:
octane
skc-file
Synonyms:
n-octane
Group of substances:
organic
Physical appearance:
colorless liquid
Empirical formula (Hill's system for organic substances):
C
8
H
1
8
Structural formula as text:
CH3(CH2)6CH3
Molar/atomic mass: 114.23
Melting point (°C):
-56.795
Boiling point (°C):
125.665
CAS №: 111-65-9
Solubility (g/100 g of solvent):
acetone
: miscible [
Ref.
]
benzene
: miscible [
Ref.
]
chloroform
: miscible [
Ref.
]
diethyl ether
: soluble [
Ref.
]
ethanol
: soluble [
Ref.
]
methanol
: 15.1 (5°C) [
Ref.
]
methanol
: 17 (10°C) [
Ref.
]
methanol
: 19 (15°C) [
Ref.
]
methanol
: 21.1 (20°C) [
Ref.
]
methanol
: 23.3 (25°C) [
Ref.
]
methanol
: 26.4 (30°C) [
Ref.
]
methanol
: 29.5 (35°C) [
Ref.
]
methanol
: 33.8 (40°C) [
Ref.
]
methanol
: miscible (65.7°C) [
Ref.
]
petroleum ether: miscible [
Ref.
]
water
: 0.000066 (25°C) [
Ref.
]
Density:
0.70252 (20°C, g/cm
3
)
Reactions of synthesis:
Yeild 48%. [
Ref.1
]
2CH
3
CH
2
CH
2
CH
2
Br + 2Na → CH
3
(CH
2
)
6
CH
3
+ 2NaBr
Refractive index (n
D
):
1.39743 (20°C)
Vapour pressure (Torr):
1 (-14°C)
10 (19.2°C)
40 (45.1°C)
100 (65.7°C)
400 (104°C)
Permittivity (dielectric constant):
1.948 (20°C)
Viscosity (mPa·s):
0.542 (20°C)
Surface tension (mN/m):
21.8 (20°C)
Speed sound (m/s):
1192 (20°C, aggregative state - liquid)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
20.65
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
41.48
Flash point (°C):
13
Standard molar enthalpy (heat) of formation Δ
f
H (298 K, kJ/mol)
-250.1 (l) [
Ref.
]
-208.5 (g) [
Ref.
]
Standard molar Gibbs energy of formation Δ
f
G (298 K, kJ/mol)
15.79 (g) [
Ref.
]
Standard molar entropy S (298 K, J/(mol·K))
466 (g) [
Ref.
]
Molar heat capacity at constant pressure C
p
(298 K, J/(mol·K))
254.6 (l) [
Ref.
]
Heat of combustion (kJ/mol)
5450.5 (l) [
Ref.
]
Critical temperature (°C):
296.2
Critical pressure (MPa):
2.5
References:
Gallant R.W., Railey J.M. Physical Properties of Hydrocarbons. - 2 ed., vol. 1 - Houston, 1992. - pp. 157-164
Journal of Chemical and Engineering Data. - 1961. - Vol. 6, No. 3. - pp. 339
Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 621
Smallwood I.M. Handbook of organic solvent properties. - 1996. - pp. 15-17
Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 536-537
Воскресенский П.И., Каверина А.А., Парменов К.Я., Цветков Л.А., Эпштейн Д.А. Справочник по химии. - 4 изд. - М.: Просвещение, 1978. - pp. 200 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 169 [Russian]
Справочник химика. - 2 изд., Т.1. - Л.-М.: Химия, 1966. - pp. 650 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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