Question
Question: The above is a plot of binding energy per nucleon E<sub>b</sub>, against the nuclear mass M; A, B, C...
The above is a plot of binding energy per nucleon Eb, against the nuclear mass M; A, B, C, D, E, F correspond to different nuclei. Consider four reactions :
(i) A + B® C + e
(ii) C ® A+ B + e
(iii) D + E ®F +e and
(iv) F ® D+ E + e , where e is the energy released ? In
which reactions is e positive ?
A
(i) and (iv)
B
(i) and (iii)
C
(ii) and (iv)
D
(ii) and (iii)
Answer
(i) and (iv)
Explanation
Solution
Released energy is positive if product is more stable.
(i) A + B ® C + e ; C is more stable than
A and B
(ii) C ® A + B + e ; A and B are less
stable
(iii) D + E ® F + e ;F is less stable than D and E
(iv) F ® D + E + e ; D and E are more stable than F
So (i) & (iv) are correct .