Question
Download Solution PDFEllingham diagram represents:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
An Ellingham diagram is a graph showing the temperature dependence of the stability for compounds. This analysis is usually used to evaluate the ease of reduction of metal oxides and sulfides.
From the Ellingham diagram, we can say that any oxide with the lower value of ΔG° is more stable than oxide with a higher value of ΔG°. We can also predict that the oxide placed higher in the diagram can be reduced by the element involved in the formation of its oxide placed lower at that temperature in the diagram.
We know that, ΔG
is Gibbs free energy. ΔG° is standard Gibbs energy change.
It is happening in case of ZnO for its reduction by Al at 1400℃.
Example:
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