Binding energies per nucleon of deuterium and helium nuclei are 1.1 MeV and 7.0 MeV. When two deuterium nuclei fuse into one helium nucleus, energy released is:
Options

Question

Binding energies per nucleon of deuterium and helium nuclei are 1.1 MeV and 7.0 MeV. When two deuterium nuclei fuse into one helium nucleus, energy released is:

G1 Physics · Accepted Answer

Two deuterons contain four nucleons. Total initial BE = 4 × 1.1 = 4.4 MeV. Final helium BE = 4 × 7.0 = 28.0 MeV. Q = 28.0 − 4.4 = 23.6 MeV. Final answer: Option A.