Question

What is the effect of the pressure on Boling point ?

Answer 1

Answer:

When atmospheric pressure increases, the boiling point becomes higher, and when atmospheric pressure decreases (as it does when elevation increases), the boiling point becomes lower. Solutes in the liquid phase also raise the equilibrium boiling temperature.

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Answer 2

Answer:

Basically, the pressure has an additive effect and, from the above stated relationship, as pressure increases, the boiling point decreases. The boiling point decreases as the vapour pressure increases. The higher the air pressure, the harder it is for the liquid to evaporate.

When pressure over a substance is increased its boiling point increases simultaneously. This is because increase in pressure decreases intermolecular space of a substance and therefore,more heat supply is required to increase the intermolecular space of the substance.... hence to make it boil.