Question

explain how the density of a substance varies with change in temperature​

Answer 1

Density is the ratio of mass to volume. ... So due to this change is volume, the density varies with change in temperature. In simpler words, heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density.

Answer 2

Answer:

Density changes with temperature because volume changes with temperature.

Density is mass divided by volume.

Density = mass/volume

As you heat something up, the volume usually increases because the faster moving molecules are further apart. Since volume is in the denominator, increasing the volume decreases the density.