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Chapter 9: Problem 57

Describe the relationship between bond length and bond energy.

Short Answer

Expert verified
There is an inverse relationship between bond length and bond energy. As the bond length increases, the bond energy decreases and conversely, as the bond length decreases, the bond energy increases.

Step by step solution

01

Definition of Bond Length

Bond length is defined as the distance between the nuclei of two bonded atoms in a molecule. It is determined by the number of bonded electrons (the bond order). The larger the bond order, the stronger the pull between the two atoms and the shorter the bond length.
02

Definition of Bond Energy

Bond energy or bond dissociation energy is defined as the amount of energy required to break one mole of a bond in a chemical compound under standard conditions. Bond energy is an indication of the strength of a bond. The larger the bond energy, the stronger the bond.
03

Relation between Bond Length and Bond Energy

There is an inverse relationship between bond length and bond energy. This means when the bond length increases, the bond energy decreases and vice-versa. The reason for this is when two atoms are closer (shorter bond length), they are held together more strongly (higher bond energy). Conversely, if the two atoms are farther apart (longer bond length), they are held together less tightly (lower bond energy).

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