Write and balance the equation for the complete combustion of acetylene, C2H2. Phase symbols and energy changes are optional.

The balanced chemical equation for the complete combustion for acetylene is

2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

From the question,

We are to write a balanced equation for the complete combustion of acetylene.

First, we will define the term combustion

Combustion is a chemical reaction between substances, usually including oxygen and usually accompanied by the generation of heat and light in the form of flame.

The balanced chemical equation for the complete combustion for acetylene is

2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

Hence, the balanced chemical equation for the complete combustion for acetylene is

2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

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2C2H2 + 5O2 —> 4CO2 + 2H2O

Explanation:

When acetylene, C2H2 under goes combustion, carbon (iv) oxide and water, H2O are produced according to the equation given below:

C2H2 + O2 —> CO2 + H2O

Thus, we shall balance the equation as follow:

C2H2 + O2 —> CO2 + H2O

There are 2 atoms of C on the left side and 1 atom on the right side. It can be balance by putting 2 in front of CO2 as shown below:

C2H2 + O2 —> 2CO2 + H2O

There are 2 atoms of O on the left side and a total of 5 atoms on the right side. It can be balance by putting 5/2 in front of O2 as shown below:

C2H2 + 5/2O2 —> 2CO2 + H2O

Multiply through by 2 to clear the fraction

2C2H2 + 5O2 —> 4CO2 + 2H2O

Thus, the equation is balanced.

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