Intermolecular Forces vs Thermal Interactions
Intermolecular forces tend to keep the molecules together. But the thermal energy of the molecules tends to keep them apart. Three states of matter are the result of balance between intermolecular forces and the thermal energy of the molecules.
- If the molecular interactions are very weak, molecules do not cling together to make liquid or solid, unless thermal energy is reduced by lowering the temperature.
- Gases do not liquefy on compression only, although molecules come very close to each other and intermolecular forces operate to the maximum.
- However, when lowering the temperature, the gases can be very easily liquefied.
- Predominance of thermal energy of a substance in three states is stated as follows
Predominance of intermolecular interactions