The density of aluminum in the solid state is 2700 kg / m3, in the liquid state is 2380 kg / m3.

The density of aluminum in the solid state is 2700 kg / m3, in the liquid state is 2380 kg / m3. What is the reason for measuring the density of aluminum.

Density is a scalar value equal to the ratio of the mass of a substance to its volume. From this definition it follows that the density is directly proportional to the mass of this substance. When aluminum passes from one state of aggregation to another (from solid to liquid), the average distance between molecules increases. Since the molecules have a mass and there are fewer of them in the same volume of aluminum, then, accordingly, the mass also decreases, and therefore the density also decreases.