If ΔG vs T graph of I → \frac{4}{3} Al + O2 → \frac{2}{3} Al2O3 II → 2Mg + O2 → 2MgO is given as below : Then ΔG vs T graph of reaction III \rightarrow 3Mg + Al2O3 \overset{}{\rightarrow} 3MgO + 2Al IV \rightarrow 3MgO + 2Al \overset{}{\rightarrow} 3Mg + Al2O3 are:

Engineering

Chemistry

Ellingham Diagram

Question

If ΔG vs T graph of

I → $\frac{4}{3}$ Al + O₂→ $\frac{2}{3}$ Al₂O₃

II → 2Mg + O₂ → 2MgO
is given as below :

Then ΔG vs T graph of reaction
III $\to$ 3Mg + Al₂O₃ $\overset{}{\to}$ 3MgO + 2Al
IV $\to$ 3MgO + 2Al $\overset{}{\to}$ 3Mg + Al₂O₃
are:

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

at T < 1400°C at T > 1400°C

III $\to$ 3Mg + Al₂O₃ $\underset{}{\to}$ 3MgO + 2Al $∆$ G < 0 $∆$ G > 0
IV $\to$ 3MgO + 2Al $\overset{}{\to}$ 3Mg + Al₂O₃ $∆$ G > 0 $∆$ G < 0