\(\Delta \mathrm{KE}=\Delta \mathrm{U}\)

\(\Rightarrow \frac{1}{2} \mathrm{mV}^{2}=\mu \mathrm{C}_{\mathrm{v}} \mathrm{d} \mathrm{T}\left[\mathrm{C}_{\mathrm{v}}=\frac{5}{2} \mathrm{R}\right]\)

\(\Rightarrow \frac{1}{2} \mathrm{mV}^{2}=\frac{\mathrm{m}}{\mathrm{M}} \times \frac{5}{2} \mathrm{R} \times \Delta \mathrm{T}\)

\(\Rightarrow \Delta \mathrm{T}=\frac{\mathrm{MV}^{2}}{5 \mathrm{R}}\)