Question

Do all substances expand on heating? Is there any substance that contracts on heating?

Answer 1

Answer:

not all substances expand on heating

Explanation:

substances like silica glass contract on heating

this is also called as negative thermal expansion

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Answer 2

Answer:

Mass of the object remains the same however solid , liquid &gases all expand when heat is added. when heat leaves all substances the molecules vibrate slower. The atom can get closer which results in matter contracting.