Consider the following reaction at 1000-C-i- Zns -12O2 g- ZnO s- - G - -360 KJ-molii- Cs- 12O2 g - COs- - G - -460 KJ-molThen choose the correct statement from the following

In Ellingham diagram, the Δ_fG^o of C lies below that of nbsp;ZnO. If the reduction is carried out at very high temperatures, the C will act as a reductant an ...

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Standard XII

Chemistry

Ellingham Diagram

Consider the ...

Question

Consider the following reaction at $1000^{\circ} C$ ,
$i . Z n (s) + \frac{1}{2} O_{2} (g) \to Z n O (s); Δ G = - 360 KJ/mol$
$i i . C (s) + \frac{1}{2} O_{2} (g) \to C O (s); Δ G = - 460 KJ/mol$
Then choose the correct statement from the following

Zinc can be oxidized by

C O

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Z n O

can be reduced by

C

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Z n O

can be reduced by

C O

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None of the above

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Solution

The correct option is B $Z n O$ can be reduced by $C$
In Ellingham diagram, the $Δ_{f} G^{o}$ of $C$ lies below that of $Z n O$ . If the reduction is carried out at very high temperatures, the C will act as a reductant and can reduce $Z n O$ .

$Z n O (s) \to Z n (s) + \frac{1}{2} O_{2} (g) Δ_{f} G^{o} = - 360$

$C (s) + \frac{1}{2} O_{2} (g) \to C O (s) Δ_{f} G^{o} = - 460$

Net reaction
$Z n O (s) + C (s) \to Z n (s) + C O Δ_{f} G^{o} = - 100$
As $Δ_{f} G^{o} = - 100 k J / m o l$ , the reaction is spontaneous.

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Similar questions

Q. Consider the following reactions at

10000^{\circ} C

(a) Z n (s) + \frac{1}{2} O_{2} (g) \to Z n O (s); Δ G^{\circ} = - 360 k J / m o l (b) C (s) + \frac{1}{2} O_{2} (g) \to C O (s); Δ G^{\circ} = - 460 k J / m o l

Then choose the correct statement from the following.

Q. Consider the following reaction at

1000^{\circ} C

i . Z n (s) + \frac{1}{2} O_{2} (g) \to Z n O (s); Δ G = - 360 KJ/mol

i i . C (s) + \frac{1}{2} O_{2} (g) \to C O (s); Δ G = - 460 KJ/mol

Then choose the correct statement from the following

Q. Consider the following reactions at 1000

^{\circ} C

(i)

Z n_{(s)} + 1 / 2 O_{2 (g)} ⟶ Z n O_{(s)}, Δ G^{\circ} = - 360 k J m o l^{- 1}

(ii)

C_{(s)} + 1 / 2 O_{2 (g)} ⟶ C O_{(g)}, Δ G^{\circ} = - 460 k J m o l^{- 1}

Choose the correct statement at 1000

^{\circ} C

Zn is the oxidant in the following reaction

$Z n (s) + \frac{1}{2} O_{2} ⟶ Z n O (s)$

Q. Following are the thermochemical reactions:

C

(graphite)

+ \frac{1}{2} O_{2} \to C O; Δ H = - 110.5

kJ/mol

C O + \frac{1}{2} O_{2} \to C O_{2}; Δ H = - 283.2

kJ/mol

The heat of reaction (in kJ/mol) for the following reaction is:

C (graphite) + O_{2} \to C O_{2}

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Consider the following reaction at 1000∘C, i. Zn(s)+12O2 (g)→ZnO(s); ΔG=−360 KJ/mol ii. C(s)+12O2 (g)→CO(s); ΔG=−460 KJ/mol Then choose the correct statement from the following

Consider the following reaction at $1000^{\circ} C$ ,
$i . Z n (s) + \frac{1}{2} O_{2} (g) \to Z n O (s); Δ G = - 360 KJ/mol$
$i i . C (s) + \frac{1}{2} O_{2} (g) \to C O (s); Δ G = - 460 KJ/mol$
Then choose the correct statement from the following