The following graph is given, between total energy and distance between the two nuclei for species H2+, H2, He2+ & He2. Which of the following statements is correct:
Correct answer: B. Bond dissociation energy of H2+ is more than bond dissociation energy of He2+.
- A. He2+ is more stable than H2+.
- B. Bond dissociation energy of H2+ is more than bond dissociation energy of He2+.
- C. Since bond orders of He2+ and H2+ are equal hence both will have equal bond dissociation energy.
- D. Bond length of H2+ is less than bond length of H2.
Explanation
The more the negative energy, the more is the stability of the ion/molecule. H2+ is more stable than He2+. The bond dissociation energy of H2+ is more than the bond dissociation energy of He2+ as more energy is released when H2+ is formed.
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