Here's a breakdown:

* Sublimation: A physical change of state where a solid directly transforms into a gas without passing through the liquid phase.

* Particles: The particles in a solid are tightly packed and have strong intermolecular forces holding them together.

* Sublimation Process: When a solid substance absorbs enough energy (usually heat), the particles gain enough kinetic energy to break free from their solid structure and transition directly into the gaseous state.

Common Examples of Sublimation:

* Dry ice (solid carbon dioxide): Dry ice sublimates at room temperature, producing a dense fog of carbon dioxide gas.

* Mothballs: Naphthalene, the active ingredient in mothballs, slowly sublimates over time, releasing a vapor that repels moths.

* Freeze-dried foods: Foods are frozen and then subjected to low pressure, causing the water in the food to sublimate, leaving a dehydrated product.

Let me know if you have more questions about sublimation or other phase changes!