Ask Question
22 August, 11:06

The average bond energy (enthalpy) for a C=C double bond is 614 kJ/mol and that of a C-C single bond is 348 kJ/mol. Estimate the energy needed to break only the π bond of the double bond of 2-butene. Express your answer numerically in joules per molecule.

+5
Answers (1)
  1. 22 August, 11:26
    0
    4.42x10⁻¹⁹ J/molecule

    Explanation:

    At a double bond, there's sigma and a pi bond, and at a single bond, there's only a sigma bond. Thus, if the energy to break both sigma and pi is 614 kJ/mol, and the energy to break only the sigma bond is 348 kJ/mol, the energy to break only the pi bond is:

    E = 614 - 348 = 266 kJ/mol

    Knowing that 1 kJ = 1000 J, E = 266,000 J/mol

    By Avogadro's number, 1 mol = 6.02x10²³ molecules, thus:

    E = 266,000 J/mol * 1mol/6.02x10²³ molecules

    E = 4.42x10⁻¹⁹ J/molecule
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “The average bond energy (enthalpy) for a C=C double bond is 614 kJ/mol and that of a C-C single bond is 348 kJ/mol. Estimate the energy ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers