Question

at what temperature liquids have higher density

Answer 1

It is 4°C.

Density is inversely proportionate to Volume.

With decreasing temperature, up to 4 degree Celcius, the volume of a particular amount of water shrinks and the speed of molecular movements decreases. So, the density increases gradually.

At 4 degree celcius the density becomes maximum while it is in liquid state.

Below 4 degree Celcius, water molecules start occupying crystal structure and while reaching solid state, the distance among one another increases than previous. Hence with further decrease in temperature below 4 degree Celcius, the volume slightly increases and the density decreases.

One example is:

In countries falling under sub-polar and polar circles, water pipes often crack as water becomes ice in cold temperature. It means ice has more volume than its equivalent amount of water.

Answer 2

27 degree or more than is temperature where liquid have have higher density if it goes lower it starts to freezing it become ice and it starts to floats.
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