Question

C2H5OH + O2 = CO2 + H2O +heat (balance this Chemical equation)

Answer 1

C2H5OH+3O2=2CO2+3H2O

Answer 2

the balanced chemical equation is  $C_{2} H_{5} OH + 3O_{2} = 2CO_{2} + 3H_{2}O$

• balancing chemical equation means that we balance every atom present in the chemical equation.

• it means that number of atoms in the reactant side must be equal to the number of atoms on the product side.

• we have to add the number of atoms of a particular type present in every reactant. as in the given question we can see that O is         present  in  $C_{2} H_{5} OH$ as well as $O_{2}$

now calculating total atoms of every species on reactant side:

• C = 2 atoms
• H = 6 atoms
• O=  3 atoms

now calculating total atoms of every species on product  side:

• C = 1 atom
• H = 2 atoms
• O=  3 atoms

1. for making C atoms equal we write 2 in CO2 in product side
2. for making H atoms equal we write 3 in H20 in product side

• now after the processes 1 and 2 the number of O atoms become 7 at product side. now to equalise O atoms we write 3 before O2 in reactant side.

• so the correct balanced equation will be:

$C_{2} H_{5} OH + 3O_{2} = 2CO_{2} + 3H_{2}O$

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