\begin{table}%t2
\caption{\label{Energies}Reaction rates and barriers for CO~+ H and H$_2$CO~+ H for different temperatures.}
\small%\centering
\par
\begin{tabular}{ccccc}
\hline\hline
$T$ & \multicolumn{2}{c}{CO~+ H} & \multicolumn{2}{c}{H$_2$CO~+ H}\\
& barrier & rate  & barrier & rate  \\
(K) & (K) & (s$^{-1}$) &(K) & (s$^{-1}$)\\
\hline
12.0 & 390 $\pm$ 40 & $2 \times 10^{-3}$ & 415 $\pm$ 40 & $2 \times 10^{-4}$ \\
13.5 & 435 $\pm$ 50 & $2 \times 10^{-3}$ & 435 $\pm$ 50 & $2 \times 10^{-3}$\\
15.0 & 480 $\pm$ 60 & $3 \times 10^{-3}$ & 470 $\pm$ 60 & $5 \times 10^{-3}$ \\
16.5 & 520 $\pm$ 70 & $4 \times 10^{-3}$ & 490 $\pm$ 70 & $2 \times 10^{-2}$ \\
\hline
\end{tabular} 
\end{table}