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Physics · 2022 · 3 marks
CBSE 2022 · Region 2 · Set 1 · Q9
(a) Depict the variation of the potential energy of a pair of nucleons with the separation between them. (b) Imagine the fission of a _26^56 Fe into…
(a)
Depict the variation of the potential energy of a pair of nucleons with the separation between them.
(b)
Imagine the fission of a $\displaystyle { }_{26}^{56} \mathrm{Fe}$ into two equal fragments of $\displaystyle { }_{13}^{28} \mathrm{Al}$ nucleus. Is the fission energetically possible ? Justify your answer by working out Q value of the process. Given : $\displaystyle \mathrm{m}\left({ }_{26}^{56} \mathrm{Fe}\right)=55 \cdot 93494 \mathrm{u}, \mathrm{m}\left({ }_{13}^{28} \mathrm{Al}\right)=27 \cdot 98191 \mathrm{u}$.
Marking-scheme solution
(a)
(b)
Mass Difference $\displaystyle = 55.93494 - 2 \times 27.98191$
$\displaystyle = -0.02442\ \mathrm{u}$
Fission not possible.
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