English: Although the two bonds are the equivalent in the original symmetric water molecule, the bond-dissociation energy of the oxygen–hydrogen bond in the resulting hydroxyl radical is different from that in the original water molecule. These two bond-dissociation energies are then averaged to find the O-H bond energy in a full molecule of water.
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Captions
Shows how the average bond energy of a molecule of water is calculated given each individual bond's dissociation energies.