What is a change in the properties of matter that does not change the the identity of the substance?

Answer 1

physical changes, like changing state.

A physical change, such as melting a solid into a liquid or boiling a liquid into a gas, does change a substance's identity. However, a physical change only modifies the arrangement of the particles; it does not change the particles themselves.

As a common example, water remains water even after it freezes or boils and turns into water vapor, both of which are forms of solid water.

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Answer 2

Xavier Avery

A change in the properties of matter that does not change the identity of the substance is a physical 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.