In this problem we wish to develop the combustion equation and determine the air-fuel ratio for the complete combustion of n-Butane (C4H10) with theoretical air.

• A. 15.4 kg-air/kg-fuel
• B. 12.5 kg-air/kg-fuel
• C. 12.4 kg-air/kg-fuel
• D. 15.5 kg-air/kg-fuel