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What is the differences between physical changes and chemical changes?

Answer 1

Chemical change is characterized by the formation of new substances, and the making and breaking of strong chemical bonds.........

On the other hand, physical changes are largely changes of state, i.e. solid to liquid to gas, where chemical bonds are not explicitly broken. Note that both chemical change and physical change can be reversible or irreversible.

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Answer 2

Jeremiah Adams

Chemical changes lead to the formation of new substances with distinct chemical compositions, whereas physical changes involve alterations to a substance's physical state or appearance without changing its chemical composition.

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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.