What term refers to a fuel-to-air ratio in which, during combustion, all of the fuel is burned?

What term refers to a fuel-to-air ratio in which, during combustion, all of the fuel is burned?

• A. Lean mixture
• B. Equivalence ratio
• C. Stoichiometric
• D. Rich mixture

Answer: (C)

Stoichiometric combustion is the fuel-to-air ratio at which all of the fuel is burned during combustion. At this exact proportion, the amount of oxygen available from the air is just enough to completely oxidize the fuel, so the reaction leaves no unburned fuel and no excess oxygen. In practice, lean mixtures have more air than needed and leave some oxygen after burning, while rich mixtures have less air and leave some fuel unburned. For many hydrocarbon fuels, the stoichiometric air-to-fuel ratio is about 14.7:1 by mass.

Stoichiometric combustion is the fuel-to-air ratio at which all of the fuel is burned during combustion. At this exact proportion, the amount of oxygen available from the air is just enough to completely oxidize the fuel, so the reaction leaves no unburned fuel and no excess oxygen. In practice, lean mixtures have more air than needed and leave some oxygen after burning, while rich mixtures have less air and leave some fuel unburned. For many hydrocarbon fuels, the stoichiometric air-to-fuel ratio is about 14.7:1 by mass.