How much energy is released when 0.600 µg of 3H have decayed to ³He? Use 1 u = 931.494 MeV/c²,M(³He)= 3.01493 u,and M(³H)= 3.01550 u.

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The mass defect is (3.01550 u - 3.01493 u) = 0.00057 u. The energy released per decay is 0.00057 u × 931.494 MeV/u = 0.5319 MeV. Converting to joules: 0.5319 MeV × 1.60218 × 10^-13 J/MeV = 8.52 × 10^-14 J. For 0.600 µg of 3H, the number of atoms is (0.600 × 10^-6 g / 3.01550 u) × (6.022 × 10^23 atoms/mol) = 1.197 × 10^17 atoms. Total energy = 1.197 × 10^17 atoms × 8.52 × 10^-14 J/atom = 1.02 × 10^4 J.

How Much Energy Is Released When 0