A heavy nucleus X of mass number 240 and binding energy per nucleon 7.6 MeV is splitted, into two fragments Y and Z of mass numbers 110 and 130. The binding energy of nucleons in Y and Z is 8.5 MeV per nucleon. Calculate the energy released per fission in MeV.
In these type of questions, we have to keep in mind about the difference of mass involved between output and input. Energy will be involved accordingly. Energy released per fission =
(110+ 130)x 8.5 MeV-240x7.6 MeV = 240 x (8.5 - 7.6) MeV = 240 x 0.9 = 216 MeV