Water and ice Density and Temperature

1.As the temperature increases, the density of a substance decreases. Is it true for every substance? 2.The density decreases as we decrease the temperature of water (water undergoes a phase change to ice on decreasing the temperature). Please explain this phenomena in terms of temperature. How does the same change with different substances?
- Madhu (age 18)
India

We've discussed the way some substances contract when heated here: https://van.physics.illinois.edu/qa/listing.php?id=11890.

This answer should help you start with the second question: https://van.physics.illinois.edu/qa/listing.php?id=1736.

Mike W.

(published on 05/30/2015)