the simple answer is boiling. when the vapor pressure of the liquid matches or exceeds the pressure on the liquid it will turn to vapor. a pot of water on a stove at sea level will boil,or vaporize, when the vapor pressure meets or exceed 14.7 psi, or atmospheric pressure. this as we know is reached at 212 degrees F, or 100 deg C. as the pot is elevated the temperature to boil is reduced due to the reduced atmospheric pressure at a given elevation. a typical lab experiment hooks a vacuum pump up to a container of water, and at some level of vacuum the water will boil, or vaporize, with no increase in temperature required; only by decreasing the pressure on the liquid to the vapor pressure.
If only water molecules from the surface are going into the gaseous phase, then this is called evaporation. All liquids will exhibit some amount of evaporation at a temperature below the boiling point, depending on its vapor pressure. Vapor pressure depends on temperature, and each liquid will have its own vapor pressure vs. temperature curve. When a liquid is hot enough that its vapor pressure is equal to that of the atmosphere, then the proper term is "boiling". At this point, molecules throughout the volume of the liquid now have the energy to enter the gas phase, not just at the surface.
Water vapor changes to liquid water during the process of condensation.
Liquid water becomes water vapor at any temperature through evaporation, and also at the boiling point, i.e. for pure water, 100oC.
At any temperature through evaporation, it will turn into water vapor, also known as steam.
The process is evaporation
A phase change.
condensation
bubbles rise to the surface of a heated liquid as it changes to gas because they are less dense than the liquid.
Then that molecule will escape the surface of the liquid and become a molecule of gas. This is the process by which water slowly evaporates even when not heated.
Boiling - when the liquid is heated to a gas. Evaporating - when the air temperature is hotter than the surface of the liquid so the water turns into water vapor or a gas.
As heat increases the surface tension decreases.
Evaporation is the process and the gas formed by liquid in heated condition is called vapours
a cat
Boiling - when the liquid/solid is heated to a gas. Evaporating - when the air/room temperature is hotter than the surface of the solid/liquid so the water turns into water vapor.
When a liquid changes to a gas below its surface as well as at the surface, the liquid is at a temperature equal to or greater than its boiling point.
Liquid water is changed to water vapor by the process of evaporation (or boiling)Water vapor forms into clouds (liquid droplets) by the process of condensation
The process of gas changed to liquid is called Condensation.
vaporization
he process of which a form of matter is changed into liquid.