Consider the Fusion Reaction ${}^{2}_{1}$ H ${}^{2}_{1}$ H ${}^{2}_{1}$ H → ${}^{4}_{2}$

Short Answer

Consider the fusion reaction: ${}^{2}_{1}$ H + ${}^{2}_{1}$ H + ${}^{2}_{1}$ H → ${}^{4}_{2}$ He + ${}^{1}_{1}$ H + ${}^{1}_{0}$ n
The know atomic masses are
${}^{2}_{1}$ H: 2.01410 u
${}^{4}_{2}$ He: 4.00260 u $\begin{array} { l } 1 \\1\end{array}$ H: 1.00783 u
${}^{1}_{0}$ n: 1.008665 u
where 1 u = 1.6605 × 10-27 kg.What mass of deuterium fuel, ${}^{2}_{1}$ H,is used up in producing $5.6 \times 10^{15} \mathrm {~J}$ of energy by this reaction?