Why does a substances density decrease as it heats up

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Chemistry

Audrey Burton

27 April, 06:51

Why does a substances density decrease as it heats up

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Lea Wheeler · Answer 1

Heating a certain substance causes molecules to speed up and spread slightly further apart, having a larger volume that results in a decrease in the density. Cooling a substance causes molecules to slow down and get closer together, occupying a smaller volume that results in the increase in density.