the-bond-dissociation-energy-decreases-for-the-following-bonds-h-f-570-kj-mol-h-

Question

The bond dissociation energy decreases for the following bonds: H–F (570 kJ/mol), H–Cl (432 kJ/mol), H–Br (366 kJ/mol), and H–I (298 kJ/mol). Which of the statements below best explains why?

Accepted Answer

The polarity of the bonds decreases which results in a decrease in bond strength.

Answer

The length of the bonds decreases which results in a decrease in bond strength.

Answer

The electronegativity difference of the atoms increases which results in a decrease in bond strength.

Answer

All of the above.

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The bond dissociation energy decreases for the following bonds: H–F (570 kJ/mol), H–Cl (432 kJ/mol), H–Br (366 kJ/mol), and H–I (298 kJ/mol). Which of the statements below best explains why?