How does atmospheric pressure affect the boiling point of matter?

Answer 1

Atmospheric pressure exerts pressure on the molecules of the liquid, confining them. In order to boil, the electrons must be excited, but must become hotter to overcome the pressure of the atmosphere. Therefore, pressure makes a liquid boil at a higher temperature. With a solid, the molecules are already compact together and have to be melted before they can be boiled. This does not require excitation of electrons, but it does require movement of electrons. Once the solid is melted, pressure will make it harder for the electrons to become excited.

Answer 2

Atmospheric pressure affects the boiling point of matter by determining the pressure exerted on the liquid. As atmospheric pressure increases, the boiling point of a substance also increases because it requires a higher temperature for the vapor pressure to equal the atmospheric pressure. Conversely, as atmospheric pressure decreases, the boiling point of a substance decreases because it requires a lower temperature for the vapor pressure to match the reduced atmospheric pressure.

Answer 3

The lower the atmospheric pressure the lower the boiling point of as liquid. The higher pressure the higher the boiling point.

Answer 4

The boiling point of a substance is reached when atmospheric pressure=vapour pressure.