Consider the fission reaction
92U236 → X117 + Y117 + 0n1 + 0n1
i.e., two nuclei of same mass number 117 are formed plus two neutrons. The binding energy per nucleon of X and Y is 8.5 MeV where as of U236 is 7.6 MV. The total energy liberated will be about
1
2 MeV
2
20 MeV
3
200 MeV
4
2000 MeV