The point at which a vapor changes to liquid is called the?

The transition point where vapor changes into liquid is known as the dew point. This term specifically refers to the temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid water. When the air temperature drops to the dew point, the air can no longer hold all of the moisture in the vapor form, leading to condensation.

Understanding the dew point is crucial in various fields, including meteorology and HVAC systems, as it helps predict weather conditions and manage humidity levels effectively. For example, knowing the dew point can assist in anticipating the formation of dew, fog, or frost, all of which impact both outdoor environments and indoor climate control.

Latent heat refers to the energy absorbed or released during a phase change, such as when water vapor condenses into liquid water, but it does not define the specific temperature at which this change occurs. Sublimation is the process where a solid changes directly into a gas without becoming liquid, and specific humidity is a measure of the mass of water vapor present in a given mass of air, neither of which pertain directly to the phase transition of vapor to liquid.