The equation for the incomplete combustion of propane is: 2C₃H₈ + 7O₂ → 6CO + 8H₂O. A cook in Jamaica notices a yellow flame and soot deposits when using a propane gas stove. What should be done to ensure complete combustion?

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Question

The equation for the incomplete combustion of propane is: 2C₃H₈ + 7O₂ → 6CO + 8H₂O. A cook in Jamaica notices a yellow flame and soot deposits when using a propane gas stove. What should be done to ensure complete combustion?

Accepted Answer

Increase the air supply to the burner — Award 1 mark for recognizing that increasing air supply provides more oxygen for complete combustion. Yellow flames and soot indicate insufficient oxygen. B is incorrect because decreasing pressure would not improve oxygen availability. C is incorrect because lower temperature does not address the oxygen deficiency. D is incorrect and dangerous; water cannot be mixed with propane.

Answer

Add water to the propane fuel

Answer

Use a lower temperature flame

Answer

Decrease the pressure of the propane gas

Answer

Increase the air supply to the burner

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