The combustion of butane occurs to produce water, carbon dioxide and heat
Explanation
The combustion reaction of butane is an exothermic reaction therefore it produce heat as one product.
Combustion of butane occurs as below equation;
2C4H10 + 13O2 → 8CO2 + 10H2O + Heat
Butane can be used as a source of fuel due to heat produce by it.