The potential energy ( y ) curve for H 2 formation as a function of internuclear distance ( x ) of the H…

The potential energy (y) curve for H2 formation as a function of internuclear distance (x) of the H atoms is shown below.

The bond energy of H2 is :

  1. (b-a)
  2. (c-a)2
  3. (b-a)2
  4. (c-a)

Solution

As per the given curve bond energy is the amount of energy is released during the bond formation is i.e. =Final-initial

So, Potential energy of two H atoms at infinite distance (initial) \(=\mathrm{a}\) and
Potential energy of two H atoms at distance equal to bond length (final) \(=\mathrm{b}\) Then,
\(\text {B.E. }=(b-a)\)

Asked in: NEET 2020 (Phase 2)

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