Evaporation:
* Occurs at the surface of a liquid. It's a gradual process where liquid molecules with enough energy escape into the gas phase.
* Can happen at any temperature. It's simply the natural tendency for liquid molecules to gain enough energy to transition into a gas.
* Rate depends on factors like temperature, surface area, and air humidity. Warmer temperatures, larger surface areas, and lower humidity increase the rate of evaporation.
Boiling:
* Occurs throughout the entire liquid. It's a rapid process where the liquid reaches its boiling point and turns into vapor bubbles.
* Happens at a specific temperature for each liquid. This temperature is called the boiling point.
* Requires a continuous input of heat. The heat energy is used to overcome the intermolecular forces holding the liquid molecules together.
Similarities:
* Both processes involve a liquid transitioning into a gas.
* Both involve the molecules gaining enough energy to break free from the liquid state.
In summary:
* Evaporation is a slower, surface-level process that happens at various temperatures.
* Boiling is a rapid, throughout-the-liquid process that happens at a specific temperature for each substance.
