Question

question 43
which bond would you expect to have the highest bond energy?
○ the c≡c in c₂h₂
○ the c-c bond in c₂h₆
○ all of the bonds should have the same energy, because they are all bonds between carbon atoms.
○ the c=c bond in c₂h₄

Explanation:

Bond energy is related to the type of carbon - carbon bond. Triple bonds (C≡C) are stronger and have higher bond energy than double bonds (C = C), and double bonds have higher bond energy than single bonds (C - C). In \(C_2H_2\), the carbon - carbon bond is a triple bond (C≡C), in \(C_2H_6\) it is a single bond (C - C), and in \(C_2H_4\) it is a double bond (C = C). So the C≡C bond in \(C_2H_2\) has the highest bond energy. The option stating all bonds have the same energy is incorrect because different types of C - C bonds (single, double, triple) have different bond energies.

Answer:

The \( \ce{C\equiv C} \) in \( \ce{C2H2} \)