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The following two reactions are known … The value of Δ H for the following reaction Fe_2 O_3( ~s)+ CO( g) longrightarrow 2 FeO( s)+ CO_2( ~g) is

NEET UG 2010 — Chemistry Physical Chemistry

2010mcqmedium

The following two reactions are known Fe2O3( s)+3CO(g)⟶2Fe(s)+3CO2( g),ΔH=−26.8 kJFeO(s)+CO(g)⟶Fe(s)+CO2( g)ΔH=−16.5 kJ\begin{aligned} & \mathrm{Fe}_2 \mathrm{O}_3(\mathrm{~s})+3 \mathrm{CO}(\mathrm{g}) \longrightarrow 2 \mathrm{Fe}(\mathrm{s})+3 \mathrm{CO}_2(\mathrm{~g}), \\ & \Delta \mathrm{H}=-26.8 \mathrm{~kJ} \\ & \mathrm{FeO}(\mathrm{s})+\mathrm{CO}(\mathrm{g}) \longrightarrow \mathrm{Fe}(\mathrm{s})+\mathrm{CO}_2(\mathrm{~g}) \\ & \Delta \mathrm{H}=-16.5 \mathrm{~kJ} \end{aligned}​Fe2​O3​( s)+3CO(g)⟶2Fe(s)+3CO2​( g),ΔH=−26.8 kJFeO(s)+CO(g)⟶Fe(s)+CO2​( g)ΔH=−16.5 kJ​ The value of ΔH\Delta \mathrm{H}ΔH for the following reaction Fe2O3( s)+CO(g)⟶2FeO(s)+CO2( g)\mathrm{Fe}_2 \mathrm{O}_3(\mathrm{~s})+\mathrm{CO}(\mathrm{g}) \longrightarrow 2 \mathrm{FeO}(\mathrm{s})+\mathrm{CO}_2(\mathrm{~g})Fe2​O3​( s)+CO(g)⟶2FeO(s)+CO2​( g) is

Official previous-year question

Held on 30 Apr 2010 · Verified 9 Jul 2026.

Options

  1. A

    +10.3 kJ+10.3 \mathrm{~kJ}+10.3 kJ

  2. B

    −43.3 kJ-43.3 \mathrm{~kJ}−43.3 kJ

  3. C

    −10.3 kJ-10.3 \mathrm{~kJ}−10.3 kJ

  4. D

    +6.2 kJ+6.2 \mathrm{~kJ}+6.2 kJ

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