Modern Physics 5 Question 27

30. The binding energies per nucleon for deuteron (1H2) and helium (2He4) are 1.1MeV and 7.0MeV respectively. The energy released when two deuterons fuse to form a helium nucleus (2He4) is

(1988,2M)

True/False

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Answer:

Correct Answer: 30. (a) 232,90 (b) 5.3MeV,1823.2MeV

Solution:

  1. 21H22He4

Binding energy of two deuterons,

E1=2[2×1.1]=4.4MeV

Binding energy of helium nucleus,

E2=4(7.0)=28.0MeV Energy released ΔE=E2E1=(284.4)MeV=23.6MeV



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