Determine the heat of the following reaction-FeO s - F e 2 O 3 s - F e 3 O 4 s Given informations-A- -1074 kJB- -22-2 kJC- -249-8 kJD- -2214-6 kJ

The correct option is B 22.2 kJ2FeO(s) → 2Fe(s) + O_2 (g) ; Δ H^∘ = + 544 kJ 2Fe_2O_3 (s) → 4Fe(s) + 3O_2 (g) ; Δ H^∘ = + 1648.4 kJ 6Fe(s) + 4O_2(g) → 2Fe_ ...

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Standard XII

Chemistry

Enthalpy

Determine the...

Question

Determine the heat of the following reaction:
$F e O (s) + F e_{2} O_{3} (s) \to F e_{3} O_{4} (s)$
Given informations:
$2 F e (s) + O_{2} (g) \to 2 F e O (s); Δ H^{\circ} = - 544 k J 4 F e (s) + 3 O_{2} (g) \to 2 F e_{2} O_{3} (s); Δ H^{\circ} = - 1648.4 k J F e_{3} O_{4} (s) \to 3 F e (s) + 2 O_{2} (g); Δ H^{\circ} = + 1118.4 k J$

- 1074 k J

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- 22.2 k J

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+ 249.8 k J

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+ 2214.6 k J

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Solution

The correct option is B $- 22.2 k J$
$2 F e O (s) \to 2 F e (s) + O_{2} (g); Δ H^{\circ} = + 544 k J 2 F e_{2} O_{3} (s) \to 4 F e (s) + 3 O_{2} (g); Δ H^{\circ} = + 1648.4 k J$
$6 F e (s) + 4 O_{2} (g) \to 2 F e_{3} O_{4} (s); Δ H^{\circ} = - 2 \times 1118.4 k J - ------------------------------------------------------------ -$
On adding.
$2 F e O (s) + 2 F e_{2} O_{3} (s) \to 2 F e_{3} O_{4} (s); Δ H^{\circ} = - 44.4 k J - ----------------------------------------------------------- - ∴ F e O (s) + F e_{2} O_{3} (s) \to F e_{3} O_{4} (s); Δ H^{\circ} = - 22.2 k J$

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Similar questions

Q. Determine the heat of the following reaction:

F e O (s) + F e_{2} O_{3} (s) \to F e_{3} O_{4} (s)

Given informations:

2 F e (s) + O_{2} (g) \to 2 F e O (s); Δ H^{\circ} = - 544 k J 4 F e (s) + 3 O_{2} (g) \to 2 F e_{2} O_{3} (s); Δ H^{\circ} = - 1648.4 k J F e_{3} O_{4} (s) \to 3 F e (s) + 2 O_{2} (g); Δ H^{\circ} = + 1118.4 k J

Q. Balance the following chemical equations:
(a)

{FeSO}_{4} \overset{Heat}{\to} {Fe}_{2} O_{3} + {SO}_{2} + {SO}_{3}

(b)

Pb ({NO}_{3})_{2} (s) \overset{Heat}{\to} PbO (s) + {NO}_{2} (g) + O_{2} (g)

Q. The standard heat of formation of

F e_{2} O_{3} (s)

is -824 kJ

m o l^{- 1}

. The heat change for reaction

4 F e (s) + 3 O_{2} (g) \to 2 F e_{2} O_{3} (s)

is:

Q. What will be the heat reaction for the following reaction? Will the reaction be exothermic or endothermic?

F e_{2} O_{3 (s)} + 3 H_{2} O_{(l)}

△ \int H^{0} (H_{2} O, I)

- 285.83 k J m o l^{- 1}

△ \int H^{0} (F e_{2} O_{3}, S)

- 824.2 k J m o l^{- 1}

When ferrous sulphate is heated the following reaction takes place:

$2 F e S O_{4} (s) \to F e_{2} O_{3} (s) + S O_{2} (g) + S O_{3} (g)$

The above reaction is called __________ of ferrous sulphate.

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Determine the heat of the following reaction: FeO(s)+Fe2O3(s)→Fe3O4(s) Given informations: 2Fe(s)+O2(g)→2FeO(s); ΔH∘=−544 kJ4Fe(s)+3O2(g)→2Fe2O3(s); ΔH∘=−1648.4 kJFe3O4(s)→3Fe(s)+2O2(g);ΔH∘=+1118.4 kJ