What does the Ellingham diagram show? Name some metals that can and cannot be purified by
reducing the metal oxides with carbon.
How is Al obtained?
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Introduction
A graph depicting the relationship between compound stability and temperature is known as an Ellingham diagram. Usually, this study is done to determine how easily metal oxides and sulphides can be reduced. Harold Ellingham created the initial versions of these diagrams in 1944. The Ellingham diagram is used in metallurgy to forecast the temperature at which an oxide of metal would reach equilibrium with oxygen, and consequently, the reactions of that oxide with sulphur, nitrogen, and other non-metals. The diagrams are helpful in forecasting the circumstances that will cause an ore to be converted into its metal. Reaction kinetics are disregarded because the analysis is thermodynamic in nature. As a result, Ellingham diagram-predicted favourable processes may nonetheless proceed slowly.
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