Energy released in nuclear fission

Energy released in nuclear fission reaction:

92U235 + 0n1 42Mo95 + 57La139 + 20n1 + 7-1e0

The isotopic mass of U235 = 235.118 amu
The isotopic mass of 42Mo95 = 94.936 amu
The isotopic mass of 57La139 = 138.95 amu
The isotopic mass of 0n1 = 1.009 amu

∴ 235.118 + 1.009 → 94.936 + 138.95 + 2 × 1.009
236.127 amu → 235.906 amu

∴The mass transformed into energy is
= (236.127 – 235.906) amu
= 0.213 amu

As 1amu (i.e., atomic mass unit) = 931 MeV, for one 235U fission energy discharged = 0.213 × 931.48 = 200 MeV

 

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