Which molecule is produced during the combustion of ethanol?

During the combustion of ethanol, the primary products are carbon dioxide and water vapor. The chemical equation for the complete combustion of ethanol ((C_2H_5OH)) is:

[ C_2H_5OH + 3O_2 \rightarrow 2CO_2 + 3H_2O ]

In this reaction, ethanol reacts with oxygen to produce carbon dioxide and water vapor. While hydrogen gas and carbon monoxide could appear under incomplete combustion conditions or when there isn't enough oxygen, they are not produced in significant amounts during the complete combustion of ethanol. Thus, the predominant and straightforward outcome of combusting ethanol is the generation of water vapor, making it the most accurate choice. This reflects the overall expectation of products from complete combustion in a well-ventilated environment, where sufficient oxygen is available for the reaction.