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Is iron rust an example of a physical or chemical change?

Answer 1

The rusting of iron is clearly an example of chemical change.

Chemical change is characterized by the formation of new substances and the making and breaking of strong chemical bonds. In these circumstances we break iron-iron bonds and oxygen-oxygen bonds, and form #Fe^(II)O# and #Fe^(III)O# bonds. See this older answer.

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Answer 2

Peyton Adams

One instance of a chemical change is the rusting of iron.

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Answer 3

Xavier Avery

Iron rusting is an example of a chemical change.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.