Figure 1 shows a sealed autoclave heating chamber containing three test tubes. The first contains gallium metal, the second contains carbon dioxide gas, and the third contains a liquid thermosetting monomer.
After heating the chamber to 50 ∘C50\ ^\circ\text{C}50 ∘C, the substances are allowed to cool back to the initial temperature of 10 ∘C10\ ^\circ\text{C}10 ∘C.
The physical states of each substance at different stages are recorded in the table below.
| Substance | State at 10 ∘C10\ ^\circ\text{C}10 ∘C | State at 50 ∘C50\ ^\circ\text{C}50 ∘C | State after cooling back to 10 ∘C10\ ^\circ\text{C}10 ∘C |
|---|---|---|---|
| Gallium | Solid | Liquid | Solid |
| Carbon dioxide | Gas | Gas | Gas |
| Thermosetting monomer | Liquid | Solid | Solid |
Describe the differences in the arrangement and movement of the particles in a liquid and in a gas.