pressurize it
The boiling point of a liquid is the temperature at which the vapor pressure of the liquid equals the atmospheric pressure, or the pressure above the liquid. So, to increase the boiling point without adding a solute, one can increase the pressure above the liquid.
How can the boiling point of a liquid be raised without adding any impurity?
If the solid is insoluble, it will have little or no effect on the boiling point. If it is soluble, it will raise the boiling point.
Vaporization at the surface of a liquid that is not boiling is called evaporation. It is a process in which molecules of a liquid escape into the gas phase without the liquid reaching its boiling point. Evaporation occurs at temperatures below the boiling point of the liquid.
- You can change the boiling point of a liquid if you add different solutions or chemicals that alter its physical and chemical properties. - Also it can depend on pressure. If, for instance, you were on a mountain the pressure would be higher so the boiling point would be lower.
To evaporate.
A soluble nonvolatile impurity increases the boiling point of a liquid because it disrupts the intermolecular forces between the solvent molecules, making it more difficult for the liquid to vaporize. This phenomenon is known as boiling point elevation.
Evaporation Volatile
evaporation
Generally speaking, methane gas can be "soluble" in liquid nitrogen if it was bubbled into it. Liquid nitrogen is cold enough to liquefy methane gas, and the liquid methane would then be miscible in the liquid nitrogen.
Changing a liquid to gas without boiling is known as evaporation. This occurs when the molecules of a liquid gain enough energy to escape into the air as vapor, without the need to reach the boiling point of the liquid. Evaporation is a natural process that happens at any temperature, but faster with higher temperatures.
Adding soluble substances in a liquid the freezing point is decreased.