Question

Classify the above changes as physical or chemical changes.

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Answer 1

Chemical change

Chemical changes are frequently harder to reverse than physical changes. Observations that indicate a chemical change occurred include color change, temperature change, light given off, formation of bubbles, formation of a precipitate, etc

Physical change

A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. Physical changes canfurther be classified as reversible or irreversible. The melted ice cube may be refrozen, so melting is a reversible physical change.

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