Answer
The reaction is exothermic, and releases 4.806 MeV of energy.
Work Step by Step
Calculate the Q-value, using data from Appendix B. We use atomic masses.
$$Q=\left(m_{n}+m(^{238}_{92}U)-m(^{239}_{92}u) \right)c^2$$
$$ =\left(1.008665u+238.050788u-239.054294u\right)c^2\left( \frac{931.49MeV/c^2}{u}\right)$$
$$=4.806MeV$$
The Q-value is positive. The reaction is exothermic, and releases 4.806 MeV of energy.
