In a fission reaction92U236 → 117X + 117Y + n + nthe

Home » Modern Physics » Nuclei » Question

In a fission reaction
₉₂U²³⁶ → ¹¹⁷X + ¹¹⁷Y + n + n
the binding energy per nucleon of X and Y is 8.5 MeV whereas of ²³⁶U is 7.6 MeV. The total energy liberated will be about

1. 2000 MeV
2. 200 MeV
3. 2 MeV
4. 200 keV

Correct Option: B

Binding energy
= 117 × 8.5 + 117 × 8.5 – 236 × 7.6
= 234 × 8.5 – 236 × 7.6
= 1989 – 1793.6 = 200 MeV
Thus, in per fission of Uranium nearly 200 MeV energy is liberated