Chemical Properties of Carbon Compounds

Carbon compounds are chemical substances that contain carbon atoms bonded with other elements, such as hydrogen, oxygen, nitrogen, or halogens.

They undergo various chemical reactions due to the presence of covalent bonds and different functional groups in their molecules.

The main types of chemical reactions shown by carbon compounds are:

1) Combustion Reaction

• Combustion is a chemical reaction in which a carbon compound burns in the presence of oxygen to produce carbon dioxide and water, releasing a large amount of heat and light energy.
• Because of this property, many carbon compounds are used as fuels.

Example: methane burns in oxygen to form carbon dioxide and water.

CH₄ +    2O₂     →   CO₂ +  2H₂O  +   Heat    

This reaction releases energy, which is why methane is commonly used as a fuel for cooking and heating.

2) Oxidation Reaction

• Oxidation is a reaction in which a substance gains oxygen or loses hydrogen.
• Many carbon compounds can be oxidized to form new compounds with different properties.
• Oxidizing agents such as potassium permanganate or potassium dichromate are commonly used for this purpose.

Example: ethanol can be oxidized to form ethanoic acid.

CH₃CH₂OH + [O] → CH₃COOH + H₂O

This reaction shows how alcohol can be converted into an acid through oxidation.

3) Substitution Reaction

• Substitution reactions occur mainly in saturated hydrocarbons.
• In this reaction, one atom or group of atoms in a molecule is replaced by another atom or group.

Example: methane reacts with chlorine in the presence of sunlight to form chloromethane, in the presence of sunlight / UV light.

CH₄   +    Cl₂    →    CH₃Cl     +    HCl

In this reaction, one hydrogen atom of methane is replaced by a chlorine atom.

4) Addition Reaction

• Addition reactions occur mainly in unsaturated hydrocarbons, which contain double or triple bonds.
• In these reactions, atoms or groups of atoms add across the multiple bond to form a saturated compound.

Example: hydrogen can add to ethene to form ethane in the presence of a catalyst such as nickel or palladium.

CH₂=CH₂  +    H₂    →   CH₃-CH₃          

This reaction is called hydrogenation and is used in the food industry to convert vegetable oils into solid fats.