Question

balance the chemical reaction for the combustion of ethanol. c2h5oh o2 co2 h2o in the balanced chemical equation, the coefficient for o2 is [ select ] and the coefficient for co2 is [ select ] .

Answer 1

C₂H₅OH + 3O₂  →  2CO₂ + 3H₂O

The combustion equation can be balanced as follows;

Firstly i had counted all the carbons hydrogens and oxygens on the reactant sides as follows;

C= 2           H= 6          O= 3

and on the product side as follows;

C= 1             H= 2           O=3

Then I balanced the equation by multiplied the reactants and the products with suitable coefficients.

C₂H₅OH + 3O₂  →  2CO₂ + 3H₂O

Now the given equation is balanced because it has all the reactants and products in same amount as

C= 2            H= 6             O= 7

The same concentration of Carbon, hydrogen and oxygen is present on both reactants and products side.

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