Butane c4 h10 ( = –125.7), combusts in the presence of oxygen to form co2 (g) (hf = –393.5 kj/mol), and h2 o(g) (hf = –241.82) in the reaction:

We know that Butane C4H10 reacts with Oxygen O2 to form Carbon Dioxide CO2 and Water H2O according to the balanced equation for the reaction:2 C4H10 + 13 O2 → 8 CO2 + 10 H2OIt seems you have more follow up questions.

The molecules contain like 54 of water