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25.12: Summary

Last updated

Nov 26, 2020
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- 25.11: Other Atmospheres and Non-Standard States
- 25.13: The Interactive Ellingham Diagram

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In the preceding pages we have seen that the standard free energy change for a reaction is a very useful quantity to know, in that its value affects the equilibrium constant and gives composition of the system.

We have also seen that the Ellingham diagram is a convenient way of displaying the standard free energy change of many reactions at different temperatures. We have also seen how to read the value of p_O₂ from the Ellingham diagram.

Finally, we have seen how the Ellingham diagram is used in extraction metallurgy to find the conditions needed for reduction of metal ores.

Going further

Books

D.R. Gaskell, "Introduction to the Thermodynamics of Materials" (Taylor and Francis, 1995) Third ed.
Provides a good treatment of the Ellingham diagrams pp.347-395.
E.T. Turkdogan, "Physical Chemistry of High Temperature Technology" by (Academic Press, 1980)
Main data source for the interactive diagram and deals with the physical chemistry of iron and steelmaking in ch.9.

Going further

Books

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