Solid fuel used in rocket is a mixture of Fe₂ O₃ and Al (in ratio 1: 2). The heat evolved (kJ) per gram of the mixture is _ _ _ _ _ _. (Nearest integer) Given: Δ H f ^(θ)(Al₂ O₃)=-1700 ~kJ ~mol⁻¹ Δ H f ^(θ)(Fe₂ O₃)=-840 ~kJ ~mol⁻¹ Molar mass of Fe, Al and O are 56, 27 and 16 g mol ⁻¹ respectively.

Chemical Thermodynamics: JEE Main 2023 Chemistry question

JEE Main 2023 · 11 Apr, Morning shift · Q21

JEE Main 202311 Apr, Morning shiftChemistryHardChemical Thermodynamics84× since 2002

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.

Your answerType your answer. Integers and decimals are accepted.

JEE Main 2023 Chemical Thermodynamics Question with Answer (11 Apr Morning shift, Q21) | JEE Arc