The combustion of butane occurs to produce water, carbon dioxide and heat
Step-by-step 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.