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Which of the following factors primarily determines the bond length between two atoms in a molecule?
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11. Bonding & Molecular Structure
Bond Energy
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Which of the following is closest to the bond energy per mole required to break all the O=O bonds in molecular oxygen (O_2)?
A
146 kJ/mol
B
213 kJ/mol
C
945 kJ/mol
D
498 kJ/mol
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Understand that the bond energy per mole is the amount of energy required to break one mole of a specific type of bond—in this case, the double bond in molecular oxygen (O_2).
Recall or look up the typical bond dissociation energy for the O=O double bond in O_2, which is a known standard value in chemistry reference tables.
Note that the bond energy for O=O is usually given in units of kJ/mol, representing the energy needed to break all O=O bonds in one mole of O_2 molecules.
Compare the given options to the known bond energy value for the O=O bond, which is approximately 498 kJ/mol, to identify the closest match.
Select the value closest to the known bond energy for O=O, understanding that this value reflects the strength of the double bond in molecular oxygen.
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