How much energy is generated by fission of 1kg atom u235?
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1 kg of Uranium-235 contains 1000235.044×6.023×1023=2.562×10241000235.044×6.023×1023=2.562×1024 atoms
The energy released during each U-235 fission reaction = 202.5 MeV
Assuming all the U-235 atoms undergo fission, the total energy released by the fission is 2.562×1024×202.5=5.18805×1026MeV=8.312×1013Joules2.562×1024×202.5=5.18805×1026MeV=8.312×1013Joules
Since the 1 kg of U-235 undergoes fission over the course of a single day, the total power released is simply 8.312×1018Joules86400seconds=9.62×108Watts=0.96GW
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