C₄H₈(g) + 6 O₂(g) → 4CO₂(g) + 4H₂O(l)
Hydrocarbons are organic compounds that are made up of carbon and hydrogen elements.
Complete combustion of hydrocarbon releases carbon dioxide and steam or water.
That is;
CxHy + O₂(g) → CO₂(g) +H₂O(l)
Butene, C₄H₈ is a hydrocarbon in homologous series known as alkenes. It, therefore, undergoes complete combustion to form carbon dioxide and water.
The balanced equation for the reaction is;
C₄H₈(g) + 6 O₂(g) → 4CO₂(g) + 4H₂O(l)