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Chapter 5: Q5-51P (page 190)

Which bond is stronger? Briefly explain why.

Short Answer

Expert verified

a. CH3-Cl bond is stronger.

b. I-Br bond is stronger.

Step by step solution

01

Reason of stronger bond

A bond between two atoms becomes stronger when it is hard to break, which means when the bond is strong. If there is a huge charge separation between two atoms, the bond will be weaker and easy to break as the electron is shifted towards a certain atom and not shared by both of the atoms equally.

02

 Step 2: Comparison of bond strength

a. In the 1st case, the CH3-Br bond has longer distance than CH3-Cl as Cl is more electronegative which it will pull more electrons towards it than Br which makes the latter bond stronger and hard to break.

b. In the 2nd case, the I-Br bond has a longer distance than Br-Br as in the latter case, both the Br are same in size which increases its lattice energy than the former case where one atom is I is more diffused in nature. As a matter of fact, due to high lattice energy, the Br-Br bond is stronger.

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Most popular questions from this chapter

Use what the curved arrows tell you about electron movement to determine the product(s) of each reaction step.

Draw curved arrows to show the movement of the electrons in each step of the following reaction sequences.

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Draw curved arrows to show the movement of the electrons that result in formation of the given product(s).

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