Nuclear Physics — UPSC CSE 2012 Physics PYQ

Determine from the given data whether the following reactions are exothermic or endothermic:

(i) {}^{1}_{1}\mathrm{H}+{}^{3}_{1}\mathrm{H}\rightarrow{}^{2}_{1}\mathrm{H}+{}^{2}_{1}\mathrm{H}

(ii) {}^{12}_{6}\mathrm{C}+{}^{12}_{6}\mathrm{C}\rightarrow{}^{20}_{10}\mathrm{Ne}+{}^{4}_{2}\mathrm{He}