What is the end product of complete combustion?

Complete combustion occurs when a fuel reacts completely with oxygen, resulting in a clean burn that produces specific byproducts. The primary end product of complete combustion of hydrocarbons, such as those found in oil, is carbon dioxide. This occurs because the carbon in the fuel fully oxidizes, resulting in carbon dioxide rather than carbon monoxide, which is a byproduct of incomplete combustion.

Additionally, water vapor is also produced during complete combustion as hydrogen in the fuel combines with oxygen. While nitrogen oxides can be formed during the high-temperature combustion process, they are not the primary end product. The generation of carbon dioxide and water vapor indicates that the combustion process was sufficient in terms of oxygen supply, leading to a efficient energy release with minimal harmful emissions when compared to incomplete combustion.

Thus, the correct answer highlights carbon dioxide as the main byproduct, emphasizing the importance of complete combustion in achieving optimal energy efficiency and reducing pollutants.