Question

explain combustion and substitution reaction of carbon compounds by taking methane as an example can methane be subjected​

Answer 1

Answer:

Explanation:

A combustion reaction (commonly known as burning ) is an exothermic reaction in which something reacts with oxygen. The combustion of organic compounds usually takes the form organic compound + oxygen => water + carbon dioxide.

Eg. CH4+O2------- CO2+H2O+ heat and light energy

Substitution reaction (also known as single displacement reaction or single substitution reaction) is a chemical reaction during which one functional group in a chemical compound is replaced by another functional group.

Eg:When a mixture of methane and chlorine is exposed to ultraviolet light - typically sunlight - a substitution reaction occurs and the organic product is chloromethane

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Answer 2

$CH_4 + 2O_2$ → $CO_2 + 2H_2O$

Explanation:

Combustion of Methane :

• When there is a reaction between one molecule of carbon compound like methane, in the presence of oxygen (two molecules of oxygen)

• The product formed is one molecule of carbon dioxide and two molecules of water.

• The balanced equation for the combustion of methane can be written as -

   $CH_4 + 2O_2$ → $CO_2 + 2H_2O$

Substitution reaction :

• Methane undergoes a reaction with halogens in the presence of light which is called a substitution reaction.

• In the presence of ultraviolet light, methane reacts with halogen molecules such as chlorine and bromine.

For example:

• Methane + Chlorine → Methyl chloride + Hydrogen chloride

       $CH_4 + Cl_2$ → $CH_3Cl + HCl$

• This reaction is referred to as a substitution reaction.

• The reason is that methane is replaced by one molecule of the hydrogen atom from one molecule of a Chlorine atom.

•  Methane reacts with chlorine molecule by substitution to produce one molecule of methyl chloride and hydrogen chloride.