Question

explain why a substance expand on heating​

Answer 1

Answer:

This is because when we heat a substance,it changes its internal energy.This leads to the increase in kinetic energy of every particle of the substance that is being heated.This kinetic energy makes their movement very rapidly and the particles will become apart from each other.This makes the substance to expand.

I hope it will help you.

Answer 2

Answer:

the kinetic energy is produced

Explanation:

the molcules and atoms become more and and thus extracts or expands on heating