Solid fuel used in rocket is a mixture of $\mathrm{Fe}_2 \mathrm{O}_3$ and Al (in ratio 122 ). The heat evolved (kJ) per gram of the mixture is $\_\_\_\_$ (Nearest integer)
Given
$ \begin{aligned} & \Delta \mathrm{H}_{\mathrm{f}}^{\ominus}\left(\mathrm{Al}_2 \mathrm{O}_3\right)=-1700 \mathrm{~kJ} \mathrm{~mol}^{-1}
\\ & \Delta \mathrm{H}_{\mathrm{f}}^{\ominus}\left(\mathrm{Fe}_2 \mathrm{O}_3\right)=-840 \mathrm{~kJ} \mathrm{~mol}^{-1}
\end{aligned} $
Molar mass of $\mathrm{Fe}, \mathrm{Al}$ and O are 56,27 and $16 \mathrm{~g} \mathrm{~mol}^{-1}$ respectively