Question

what happens when butane is burnt in excess of O2 . give chemical reaction

Answer 1

The combustion of butane in excess of O2(chemical equation) :-

2 C4H10 (g) + 13 O2 (g) 8 CO2 (g) + 10 H2O (g)

Answer 2

Carbondioxide and water will form along with heat and light.