Balance the reaction for the combustion of pentane:? C5H12+? O2→? CO2+? H2O Enter the four coefficients in order, separated by commas (e. G., 1,2,3,4), where 1 indicates the absence of a coefficient.

Question

Chemistry

Barrett Coleman

12 July, 07:29

Balance the reaction for the combustion of pentane:? C5H12+? O2→? CO2+? H2O Enter the four coefficients in order, separated by commas (e. G., 1,2,3,4), where 1 indicates the absence of a coefficient.

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Answers (1)

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Erika Romero · Answer 1

The four coefficients in order, separated by commas are 1, 8, 5, 6

Explanation:

We count the atoms in order to balance this combustion reaction. In combustion reactions, the products are always water and carbon dioxide.

C₅H₁₂ + ? O₂→? CO₂ + ? H₂O

We have 12 hydrogen in right side and we can balance with 6 in the left side. But the number of oxygen is odd. We add 2 in the right side, so we have 24 H, and in the product side we add a 12.

As we add 2 in the C₅H₁₂, we have 10 C, so we must add 10 to the CO₂ in the product side.

Let's count the oxygens: 20 from the CO₂ + 12 from the water = 32.

We add 16 in the reactant side. Balanced equation is:

2C₅H₁₂ + 16O₂→ 10CO₂ + 12H₂O

We also can divide by / 2 in order to have the lowest stoichiometry

C₅H₁₂ + 8O₂→ 5CO₂ + 6H₂O