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

Answer

Combustion of Alkanes

๐Ÿ”ฅ Combustion Reactions of Alkanes

What is Combustion?

Combustion is the reaction of a hydrocarbon with oxygen (Oโ‚‚) that produces carbon dioxide (COโ‚‚), water (Hโ‚‚O), and energy. The general form is:

Cโ‚“Hแตง + Oโ‚‚ โ†’ COโ‚‚ + Hโ‚‚O

(a) Combustion of Undecane (Cโ‚โ‚Hโ‚‚โ‚„)

Step-by-Step Balancing

  • Carbon: 11 โ†’ 11 COโ‚‚
  • Hydrogen: 24 โ†’ 12 Hโ‚‚O
  • Oxygen: (11ร—2) + (12ร—1) = 34 โ†’ 17 Oโ‚‚

Cโ‚โ‚Hโ‚‚โ‚„ + 17Oโ‚‚ โ†’ 11COโ‚‚ + 12Hโ‚‚O

(b) Combustion of Ethylcyclobutane (Cโ‚†Hโ‚โ‚‚)

Step-by-Step Balancing

  • Carbon: 6 โ†’ 6 COโ‚‚
  • Hydrogen: 12 โ†’ 6 Hโ‚‚O
  • Oxygen: (6ร—2) + (6ร—1) = 18 โ†’ 9 Oโ‚‚

Cโ‚†Hโ‚โ‚‚ + 9Oโ‚‚ โ†’ 6COโ‚‚ + 6Hโ‚‚O

Summary Table

Alkane Balanced Combustion Equation
Undecane (Cโ‚โ‚Hโ‚‚โ‚„) Cโ‚โ‚Hโ‚‚โ‚„ + 17Oโ‚‚ โ†’ 11COโ‚‚ + 12Hโ‚‚O
Ethylcyclobutane (Cโ‚†Hโ‚โ‚‚) Cโ‚†Hโ‚โ‚‚ + 9Oโ‚‚ โ†’ 6COโ‚‚ + 6Hโ‚‚O

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