Question

If a star can convert all the $He$ nuclei completely into oxygen nuclei, the energy released per oxygen nuclei is [Mass of $He$ nucleus is $4.0026amu$ and mass of oxygen nucleus is $15.9994amu$]

• A. $7.6MeV$
• B. $56.12MeV$
• C. $10.24MeV$
• D. $23.9MeV$

Answer 1

The correct option is C $10.24MeV$

$4_{2}H{e}^4{\to }_8{O}^{16}$
Mass defect $=\Delta M=4.0026\times 4-15.9994$ amu $=0.011$$amu$
Energy released per amu $=931MeV$ ($E=M{c}^2)$
So, total energy released per Oxygen nuclei $=10.24MeV$