When Water Evaporates?

What is Water Evaporation?

Water evaporation is the process of liquid water changing its state from liquid to gas. This process is triggered by increased heat and turbulent air flow, allowing the tiny water molecules to break free from the surface of the liquid and become airborne vapor.

Process of Water Evaporation

The process of water evaporation can be broken down into four steps:

  • Heat is added. Heat energy is the catalyst for evaporation. It causes molecules in the liquid to absorb enough energy to break the bonds that hold them together.
  • Water vapor is produced. These molecules then form vapor bubbles. These vapor bubbles are full of water vapor molecules inside them.
  • The bubbles rise. These water vapor bubbles rise to the surface as they are less dense than the surrounding liquid.
  • The vapor escapes. Finally, the vapor escapes the surface of the liquid and enters the atmosphere, where it becomes airborne water vapor.

Environmental Effects of Water Evaporation

Water evaporation plays a vital role in global climate change. By transferring latent heat from the surface of the ocean to the atmosphere, water evaporation helps to maintain global temperatures. It also plays a significant role in the hydrologic cycle and is responsible for causing precipitation. Additionally, it also helps to regulate local climate by evaporating cooler air and thus helping to reduce humidity in the atmosphere.

Uses of Water Evaporation

Water evaporation can also be used for various industrial and agricultural purposes. It can be used to concentrate liquids, such as salt solutions, by removing the excess water. It can also be used to separate oil and water, by evaporating the water and leaving behind the oil. Water evaporation is also used to make fresh water from sea water and in the production of distilled alcoholic beverages.


Water evaporation plays an important role in the global climate, hydrologic cycle and many industrial and agricultural processes. By understanding the process and environmental impacts of water evaporation, we can ensure its proper use and help to conserve this vital resource.