Question

explain why a substance expand on heating​

Answer 1

Answer:

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

Answer 2

Answer:

When the temperature increase, the will be more energy going into substance, makes the molecules vibrate more and more. As it vibrate more, the substance's volume increase, leading substance to expand

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