Write the combustion reaction of the following alkanes:(a) Undecane (C11H24) (4 points)(b) Ethylcyclobutane (4 points)Hint: Make sure

Answer

Combustion of Alkanes

🔥 Combustion Reactions of Alkanes

What is Combustion?

Combustion is the reaction of a hydrocarbon with oxygen (O₂) that produces carbon dioxide (CO₂), water (H₂O), and energy. The general form is:

CₓHᵧ + O₂ → CO₂ + H₂O

(a) Combustion of Undecane (C₁₁H₂₄)

Step-by-Step Balancing

  • Carbon: 11 → 11 CO₂
  • Hydrogen: 24 → 12 H₂O
  • Oxygen: (11×2) + (12×1) = 34 → 17 O₂

C₁₁H₂₄ + 17O₂ → 11CO₂ + 12H₂O

(b) Combustion of Ethylcyclobutane (C₆H₁₂)

Step-by-Step Balancing

  • Carbon: 6 → 6 CO₂
  • Hydrogen: 12 → 6 H₂O
  • Oxygen: (6×2) + (6×1) = 18 → 9 O₂

C₆H₁₂ + 9O₂ → 6CO₂ + 6H₂O

Summary Table

Alkane Balanced Combustion Equation
Undecane (C₁₁H₂₄) C₁₁H₂₄ + 17O₂ → 11CO₂ + 12H₂O
Ethylcyclobutane (C₆H₁₂) C₆H₁₂ + 9O₂ → 6CO₂ + 6H₂O

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