Among the carbon to carbon bonds, the order of bond energy is
Correct answer: D. triple greater than double greater than single
- A. single greater than double greater than triple
- B. all three are equal
- C. double greater than triple greater than single
- D. triple greater than double greater than single
Explanation
More shared pairs mean a greater attraction between the nuclei and the bonding electrons, so the triple bond is the strongest and also the shortest at 0.120 nm, against 0.154 nm for a single bond. Bond energy and bond length always move in opposite directions. Note that a triple bond is not three times as strong as a single one, because the two pi bonds are weaker than the sigma bond.
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About Bond Energy
Bond energy is the energy needed to break one mole of a particular covalent bond in gaseous molecules, while bond formation releases energy. Reaction enthalpy is estimated by subtracting the total energy of bonds formed from bonds broken, with attention to average bond energies and their limitations for specific molecules.
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