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18 September, 00:07

Consider the following intermediate chemical equations.

CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)

2H2O (g) → 2H2O (1)

Which overall chemical equation is obtained by combining these intermediate equations?

CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (1)

CH4 (g) + 202 (g) → CO2 (g) + 2H2O (g)

CH4 (g) + 2O2 (g) → CO2 (g) + 4H2O (g) + 2H2O (1)

CH4 (g) + 2O2 (g) → CO2 (g) + 6H2O (g)

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Answers (2)
  1. 18 September, 00:13
    0
    CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (l).

    Explanation:

    We have two equations:

    CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (g)

    2H₂O (g) → 2H₂O (l)

    To add the two equations: we omit H₂O (g) that is formed by 2 moles in the product side of the first equation and consumed by 2 moles from the reactants side in the second equation

    So, the overall chemical equation is obtained by combining these intermediate equations is:

    CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (l).
  2. 18 September, 00:27
    0
    Answer: The reaction is Exothermic

    CH4 (g) + 2O2 (g) > CO2 (g) + 2H2O (g) + energy
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