What substance has a density that increases when temperature is increased?

1 Answer
Truong-Son N.
Dec 29, 2017

Water... Its density increases when the temperature is increased from #0^@ "C"# to #4^@ "C"#:

http://www1.lsbu.ac.uk/water/density_anomalies.html

It is at #4^@ "C"# that the thermal energy available balances best with the hydrogen-bonding intermolecular interactions in water.

Above that temperature, the average kinetic energy present in the water molecules starts to dominate the strength of hydrogen-bonding and the density begins to decrease.

Perhaps you should search around a bit more until you find this answer, which agrees with what was just stated.

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