What is one of the common products when propane undergoes complete combustion?

When propane undergoes complete combustion, one of the primary outcomes is the production of carbon dioxide. During this process, propane (C3H8) reacts with oxygen (O2) in a highly exothermic reaction. The typical balanced equation for the complete combustion of propane is:

C3H8 + 5 O2 → 3 CO2 + 4 H2O

In this reaction, each molecule of propane reacts with five molecules of oxygen to produce three molecules of carbon dioxide and four molecules of water. The formation of carbon dioxide signifies that the propane has fully oxidized, as each carbon atom in the propane molecule has been transformed into carbon dioxide with no carbon left in its elemental form. This complete combustion process is efficient and results in the release of energy.

This makes carbon dioxide a significant and common product of the complete combustion of hydrocarbons like propane. While water vapor is also produced, the question specifically emphasizes one common product, making carbon dioxide a clear and direct answer.