Question

1. describe, on a particle level, what will happen to the density of the iron sample as its temperature is increased. on a particle level, if the temperature is increased, then the density will decrease. how so? - 2

Explanation:

When the temperature of iron increases, iron atoms gain kinetic energy. They vibrate more vigorously and move further apart from each other. Since density is mass per unit volume ($
ho=\frac{m}{V}$), and the volume increases while the mass remains constant, the density decreases on a particle - level.

Answer:

As the temperature of the iron sample increases, iron atoms gain kinetic energy and move further apart, causing the volume to increase while mass remains the same, resulting in a decrease in density.