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Octane

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Identification
Molecular formula
C8H18
CAS number
111-65-9
IUPAC name
octane
State
State

Octane is a liquid at room temperature.

Melting point (Celsius)
-56.80
Melting point (Kelvin)
216.35
Boiling point (Celsius)
125.00
Boiling point (Kelvin)
398.15
General information
Molecular weight
114.23g/mol
Molar mass
114.2320g/mol
Density
0.7030g/cm3
Appearence

Octane is a colorless liquid that is part of the alkane series of hydrocarbons. It is a component of gasoline and has a characteristic "gasoline-like" odor.

Comment on solubility

Solubility of Octane (C8H18)

Octane, a hydrocarbon classified as an alkane, possesses some unique characteristics regarding its solubility. Understanding its solubility can help us appreciate its behavior in various environments.

Solubility Characteristics

  • In Water: Octane is insoluble in water. This is primarily due to its non-polar nature, which prevents it from interacting favorably with polar water molecules.
  • In Organic Solvents: Octane is soluble in organic solvents, especially those that are non-polar. Examples of such solvents include:
    • Hexane
    • Toluene
    • Diethyl ether
  • Temperature Effects: The solubility of octane in these organic solvents may vary with temperature, as higher temperatures can increase solubility due to enhanced molecular motion and interactions.

In summary, the solubility of octane reflects its structure and interactions with different solvents. It remains insoluble in polar solvents like water, while demonstrating favorable solubility in non-polar organic solvents, making it a noteworthy compound in various chemical applications.

Interesting facts

Interesting Facts about Octane

Octane, a critical hydrocarbon, is well-known for its presence in gasoline. Here are some fascinating insights into this intriguing compound:

1. Energy Source

Octane is a major component in fuels, particularly in gasoline. Its high energy content makes it an efficient source of energy for internal combustion engines. This efficiency is crucial for vehicle performance and fuel economy.

2. Octane Rating

The term "octane rating" is essential in the automotive world. It measures a fuel's ability to withstand compression before igniting. The higher the octane number, the more resistant the fuel is to knocking, allowing for better engine performance. Fuels with higher octane ratings tend to provide:

  • Increased efficiency
  • Improved power output
  • Reduced engine knock

3. Environmental Impact

While octane plays a vital role in fuel performance, it also has environmental implications. Combustion of octane results in emissions that contribute to air pollution and greenhouse gas effects. Consequently, ongoing research seeks to find cleaner alternatives and additives to minimize these impacts.

4. Structural Importance

Octane's structure consists of a linear chain of carbon atoms, creating a saturated hydrocarbon. This structure is the basis for understanding:

  • Chemical reactivity
  • Combustion processes
  • Physical properties of similar hydrocarbons

5. Isomers

Did you know that octane has several isomers? These are different structural forms of octane, each with unique properties and applications. Some notable isomers include:

  • 2-Methylheptane
  • 3-Methylheptane
  • 2,2-Dimethylhexane

This diversity in structure leads to various applications, highlighting the importance of understanding isomeric forms in organic chemistry.

Conclusion

In summary, octane is more than just a fuel component; it is a multifaceted compound that impacts vehicle performance, environmental considerations, and chemical education. As innovation continues, octane remains a focal point for both scientists and engineers striving for more efficient and environmentally friendly energy solutions.

Synonyms
octane
n-octane
111-65-9
Oktan
Oktanen
Ottani
n-Oktan
Oktanen [Dutch]
Oktan [Polish]
Ottani [Italian]
HSDB 108
UNII-X1RV0B2FJV
X1RV0B2FJV
NSC 9822
EINECS 203-892-1
MFCD00009556
DTXSID0026882
CHEBI:17590
AI3-28789
NSC-9822
DTXCID406882
CH3-[CH2]6-CH3
EC 203-892-1
Heptane, methyl-
Octane, all isomers
CH3-(CH2)6-CH3
Octane; NSC 9822; n-Octane
octano
Normal octane
normal-Octane
octan
Octanes
Octil
MG8
OTTANE
N-OCTANE [HSDB]
OCTANE [MI]
bmse000480
Octane, analytical standard
WLN: 8H
Octane, anhydrous, >=99%
Octane, reagent grade, 98%
n-C8H18
Octane, p.a., 99.0%
CHEMBL134886
NSC9822
HY-Y1690
Tox21_202452
c0044
LMFA11000002
AKOS015904009
NCGC00249228-01
NCGC00260001-01
CAS-111-65-9
FO166499
LS-13532
NS00006444
O0022
O0118
O0151
Octane, puriss. p.a., >=99.0% (GC)
A10542
C01387
Q150681
F0001-0244
EEE64B73-0375-4303-AFD5-0795361807FF
InChI=1/C8H18/c1-3-5-7-8-6-4-2/h3-8H2,1-2H
Octane, electronic grade, >=99.999% metals basis, >=99% (CP)
203-892-1
31372-91-5
9065-92-3