Solid fuel used in rocket is a mixture of \( Fe _{2} O _{3} \) and \( Al \) (in ratio \( 1: 2 \) ). The heat evolved (kJ) per gram of the mixture is (Nearest integer)
Given \( \Delta H _{ f }^{0}\left( Al _{2} O _{3}\right)=-1700 kJ mol ^{-1} \)
\[
\Delta H _{ f }^{0}\left( Fe _{2} O _{3}\right)=-840 kJ mol ^{-1}
\]
Molar mass of \( Fe , AI \) and \( O \) are 56,27 and \( 16 g mol ^{-1} \) respectively
