Thermodynamics

Solid fuel used in rocket is a mixture of \(\mathrm{Fe}_{2} \mathrm{O}_{3}\) and \(\mathrm{Al}\) (in ratio 1 : 2). The heat evolved \((\mathrm{kJ})\) per gram of the mixture is ____________. (Nearest integer)

Given: \(\Delta \mathrm{H}_{\mathrm{f}}^{\theta}\left(\mathrm{Al}_{2} \mathrm{O}_{3}\right)=-1700 \mathrm{~kJ} \mathrm{~mol}^{-1}\)

\(\Delta \mathrm{H}_{\mathrm{f}}^{\theta}\left(\mathrm{Fe}_{2} \mathrm{O}_{3}\right)=-840 \mathrm{~kJ} \mathrm{~mol}^{-1}\)

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