Question:
Calculate the energy that can be obtained from $1 \mathrm{~kg}$ of water through the fusion reaction ${ }^{2} \mathrm{H}+{ }^{2} \mathrm{H}^{3} \mathrm{H}+\mathrm{p}$
Assume that $1.5 \times 10^{-2} \%$ of natural water is heavy water $\mathrm{D}_{2} \mathrm{O}$ (by number of molecules) and all the deuterium is used for fusion.
Solution:
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