Question

what are the products of this reaction? * (0.5 points)
\underline{\hspace{1cm}}\ce{c5h12(l)} + \underline{\hspace{1cm}}\ce{o2(g)} \
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\bigcirc no reaction
\bigcirc co + h
\bigcirc co2 + h2
\bigcirc c5h12o2
\bigcirc co2 + h2o

Explanation:

The reaction shown is the combustion of pentane ($\ce{C5H12}$) with oxygen ($\ce{O2}$). Combustion of hydrocarbons (compounds with only C and H) in the presence of sufficient oxygen produces carbon dioxide ($\ce{CO2}$) and water ($\ce{H2O}$). The other options are incorrect: "No reaction" is wrong as hydrocarbons do combust; $\ce{CO + H}$, $\ce{CO2 + H2}$, and $\ce{C5H12O2}$ do not match the products of complete hydrocarbon combustion.

Answer:

$\boldsymbol{CO_2 + H_2O}$ (the option with "CO₂ + H₂O")