* Diffusion is driven by entropy: Diffusion is the movement of particles from an area of high concentration to an area of low concentration. This movement increases the overall entropy (disorder) of the system, which is a fundamental principle of nature.
* Energy is needed to overcome intermolecular forces: For particles to move, they need to overcome the attractive forces (like van der Waals forces) that hold them together in a concentrated area. This requires energy.
* Thermal energy is the driving force: The energy needed for diffusion typically comes from thermal energy (heat). The higher the temperature, the more energy particles have, and the faster they diffuse.
So, even though it might seem like diffusion is happening without energy, it's actually powered by the thermal energy of the particles themselves.
