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10 August, 20:26

The burning of natural gas in a gas stove is an example of a combustion reaction. natural gas is mostly methane, ch4. the o2 gas comes from the air. which of these is the correct chemical reaction for this?

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  1. 10 August, 21:57
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    CH₄ + 2 O₂ → CO₂ + 2 H₂O

    Solution:

    Balance chemical equation for said reaction is written in following steps.

    1) Write down the reactants and products first,

    CH₄ + O₂ → CO₂ + H₂O

    2) Analyze number of elements at left and right hand side,

    So,

    L. H. S R. H. S

    Carbon 1 1

    Hydrogen 4 2

    Oxygen 2 3

    So, the carbon atoms are balanced. Hydrogen atoms are greater at L. H. S, so to balance hydrogen atoms multiply H₂O at R. H. S by 2, hence,

    CH₄ + O₂ → CO₂ + 2 H₂O

    Now,

    L. H. S R. H. S

    Carbon 1 1

    Hydrogen 4 4

    Oxygen 2 4

    So, the carbon atoms are balanced. Hydrogen atoms are balanced but oxygen atoms are greater at R. H. S, so to balance oxygen atoms multiply O₂ at L. H. S by 2, hence,

    CH₄ + 2 O₂ → CO₂ + 2 H₂O

    Now,

    L. H. S R. H. S

    Carbon 1 1

    Hydrogen 4 4

    Oxygen 4 4

    Equation is balanced now.
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