How does the density of liquids or gases get affected by the rise in temperature?

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Solution

Due to the rise in the temperature of the liquids or gases, the molecules of the liquids and the gases gain kinetic energy.
Kinetic energy gained is directly proportional to the temperature of the liquid or gas.
Due to the gain of kinetic energy, the molecules move very much away from each other.
When the molecules move away from each other, volume increases.
Density gets decreased due to the increase in volume because density is inversely proportional to volume.
Hence, the density of liquids or gases gets decreased with the rise in temperature.

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Similar questions

How does the density of a liquid (or gas) vary with temperature?

Assertion

The density of liquids and gases decreases with the rise in temperature.

Reason

With the rise in temperature, the volume of the gases or liquids increases, but not mass. As density is mass per unit volume, therefore, with the increase in volume the density decreases.

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