Calculate the energy released in MeV in the following nuclear reaction : 21H+21H→32He+10n Assume that the masses of 21H,32He and neutron (n) respectively are 2.020, 3.0160 and 1.0087 in amu.
A
14.25 MeV
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B
1.425 MeV
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C
142.5 MeV
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D
1425 MeV
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Solution
The correct option is A14.25 MeV The mass defect is the difference between the mass of reactants and the mass of products. Δm=2×m12H−m23He−mn=(2×2.020)−(3.0160+1.0087)=4.040−4.0247=0.0153 The energy released during the nuclear reaction is ΔE=Δm×931.48MeV=14.25MeV