Calculate the amount of energy released during the a decay of 
Atomic mass of 
= 238.05079 u
Atomic mass of 
= 234.04363 u
Atomic mass of 
= 4.00260 u
1u = 931.5 Me V/c2
Is this decay spontaneous? Give reason.
Asked by Topperlearning User | 2nd Jun, 2015, 09:11: AM
Expert Answer:
The amount of energy released during a decay,
Q = 
Q = [238.05079 - 234.04363 - 4.00260] x 931.5 MeV
Q = 0.00456 x 931.5 = 4.25 MeV
No net energy is required for this reaction because energy is already produced by the conversion of lost mass energy. Because of this, the reaction is spontaneous.
Answered by | 2nd Jun, 2015, 11:11: AM
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