Some metals experience a decrease in melting point after being oxidized to oxides. Is it possible to predict it? What is the basis for the prediction?

2020-10-21View Original

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Some metals experience a decrease in melting point after being oxidized to oxides. Is it possible to predict it? What is the basis for the prediction?

Reply #22020-10-21

This post was last edited by qugd on 2020-10-21 at 16:30. Please give some examples of simple oxidation reactions. The melting points of simple oxides in general do not decrease significantly, but this is indeed the case for some oxides that can form high-valent metal oxyacids. Such as chromium trioxide, manganese heptoxide, tungsten trioxide, etc. There is no inherent pattern regarding the melting points of metal oxides with low prices; it is necessary to consider bond energy and bond length in order to make a judgment.

Reply #32020-10-28

It can be simulated using Factsage

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