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Question 15: NCERT Solutions for 12th Class Physics: Chapter 13-Nuclei
The Q value of a nuclear reaction A + b—>C+d is defined by Q = [mA + mb-mc– md] c2, where the masses refer to the respective nuclei, Determine from the given data the Q-value of the following reactions and state whether the reactions are exothermic or endothermic.
(i)
(ii)
Atomic masses are given to be
Solution:
(i) Let us find the Q value in given first equation,
Negative Q value shows that reaction is endothermic.
(ii) Q value in the given second equation
Positive Q shows that the reaction is exothermic.
Check the complete chapter with solutions.
NCERT Solutions for 12th Class Physics: Chapter 13-Nuclei