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 ---------(Neatest integer)

Given :
\[
\begin{aligned}
& \Delta H _{ f }^\theta\left( Al _2 O _3\right)=-1700 kJ mol ^{-1} \\
& \Delta H _{ f }^\theta\left( Fe _2 O _3\right)=-840 kJ mol ^{-1}
\end{aligned}
\]

Molar mass of \(Fe , Al\) and \(O\) are 56, 27 and \(16 g mol ^{-1}\) respectively.

Question

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 ---------(Neatest integer)

Given :
\[
\begin{aligned}
& \Delta H _{ f }^\theta\left( Al _2 O _3\right)=-1700 kJ mol ^{-1} \\
& \Delta H _{ f }^\theta\left( Fe _2 O _3\right)=-840 kJ mol ^{-1}
\end{aligned}
\]

Molar mass of \(Fe , Al\) and \(O\) are 56, 27 and \(16 g mol ^{-1}\) respectively.

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