Answer to Question #55942 in General Chemistry for Lia
What effect does (a) decreasing the pressure or (b) increasing the pressure above a liquid have on the liquid’s boiling point?
At boiling point the pressure of vapors of the liquid equals the pressure above the liquid. Also, the pressure is directly proportional to temperature as shown by Gay-Lussac’s law: p = CT, where C –the constant. a) Hence, if the external pressure decreases the liquid boils at the lower temperature. Boiling point decreases; b) On contrary, increasing the pressure increases the boiling point.