Covalent Bond Strength
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A covalent bond's strength is measured by its bond dissociation energy, the energy required to break one mole of that bond in the gas phase.
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A carbon-carbon triple bond's dissociation energy exceeds a carbon-carbon single bond's, matching the triple bond's shorter length.
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Bond dissociation energy is defined for breaking a bond, absorbing energy — forming that same bond releases the identical amount.