Question

Which has more density-

Cold Air OR Hot Air WHY.

Answer 1

cool air has more density because in it a strong intermolecular forces act

Answer 2

The absorbed energy makes the molecules in air move and expand, therefore decreasing the airs density. The opposite is true for cold air. It is more dense because the molecules are closer together and they are closer together because the bonds are absorbing less energy and therefore do not move as much.