Consider the nuclear reaction: ⁷Li + ¹p ? ⁴He + ⁴He. The known atomic masses are ⁷Li: 7.016005 u $\begin{array} { l } 4 \\2\end{array}$ He: 4.002603 u
¹p: 1.007825 u
What is the Q-value (or reaction energy) of this reaction? (1 u = 931.5 MeV/c²)

Question

Consider the nuclear reaction: ⁷Li + ¹p ? ⁴He + ⁴He. The known atomic masses are ⁷Li: 7.016005 u

\begin{array} { l } 4 \\2\end{array}

He: 4.002603 u
¹p: 1.007825 u
What is the Q-value (or reaction energy) of this reaction? (1 u = 931.5 MeV/c²)

Quizplus · Accepted Answer

The Q-value is calculated by finding the mass defect and converting it to energy. The mass defect is the difference between the initial and final masses: (7.016005 u + 1.007825 u) - 2(4.002603 u) = 0.018875 u. Converting this to energy gives 0.018875 u * 931.5 MeV/u = 17.35 MeV.

Consider the Nuclear Reaction: 7Li + 1p ? 4He 42\begin{array} { l } 4 \\2\end{array}42​

Consider the Nuclear Reaction: ⁷Li + ¹p ? ⁴He $\begin{array} { l } 4 \\2\end{array}$