Definition - What does Boiling Point mean?
Boiling Point is the temperature level at which vapor pressure of a liquid rises and equals the pressure surrounding the liquid causing it to change into vapor. It varies based on the environmental pressure of the surrounding. In a vacuum, a liquid will have a lower boiling point than a liquid at atmospheric pressure. The Boiling Point is higher for liquids having higher pressure than liquids at atmospheric pressure. The chemical element Helium has the lowest boiling point and Tungsten has the highest boiling point.
Petropedia explains Boiling Point
When a liquid is heated, it reaches a certain temperature at which the vapor pressure increases to a level that it forms bubbles in the liquid. This temperature is the boiling point of the liquid. The temperature remains stable till the complete amount of the liquid is converted into gas.
Sometimes the liquid may change to vapor at a temperature below its boiling point by the process of evaporation which is a phenomenon where molecules are located adjacent to the liquid's edge. These molecules do not contain enough liquid pressure on that side and escape into the surroundings as vapor. Whereas, boiling is the process where molecules located anywhere in the liquid may escape and results in the formation of vapor bubbles.