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A new substance is produced.

Bubbles are given off (fizzing), which shows that a gas has been produced.

Color changes.

Turbidity (cloudiness)

heat/light given off.

A sound is produced/an explosion occurs

etc

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What is another word for chemical change?

reaction, chemical process, chemical change, chemical action


Is melting wax a physical chemical or nuclear change?

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The temperature increase from 90 to 100 degrees for heptane would not cause a chemical change. It would only result in a physical change, such as a phase change from liquid to gas.


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Mixing Epsom salt and ammonia would result in a physical change. It is considered physical because no new substances are formed during the mixing process.


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If you mean a change in chemical identity, that would be a chemical change.


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