How does atmospheric pressure affect the boiling point of a liquid?

Answer 1

even though it's not "completely accurate," knowing the Ideal Gas Law helps to answer all these questions

PV=nrT

If P rises, T must rise to match, given V, n and r all stay the same. Your question doesn't have them changing, so it's a legitimate assumption.

So, moving to a place with a higher atmospheric pressure, the boiling point must rise. And vice versa: if you move to a place with a lower atmospheric pressure, the boiling point must drop.

Answer 2

Pressure Vs Boiling Point

Answer 3

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How does atmospheric pressure affect the boiling point of a liquid?

Answer 4

The boiling point corresponds to the temperature at which the vapor pressure of the substance equals the ambient pressure. Thus the boiling point is dependent on the pressure. Usually, boiling points are published with respect to standard pressure (101.325 kilopascals or 1 atm). At higher elevations, where the atmospheric pressure is much lower, the boiling point is also lower. The boiling point increases with increased ambient pressure up to the critical point, where the gas and liquid properties become identical. The boiling point cannot be increased beyond the critical point. Likewise, the boiling point decreases with decreasing ambient pressure until the triple point is reached. The boiling point cannot be reduced below the triple point.

Answer 5

At less atmospheric pressure, the lower is the boiling point of a liquid and visiversa.

For instance, in the mountains water boils at a very low temperature.

Answer 6

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A liquid boils at a temperature at which its vapor pressure is equal to the pressure of the gas above it. The lower the pressure of a gas above a liquid, the lower the temperature at which the liquid will boil. The vapor pressure is the equilibrium between phases where a gas/liquid will remain without condensing or evaporating. So if you lift 0.5 atm of pressure off of a pot of water, then it's easier for the gases within your pot of water to escape into the air when you add heat, and boil your water. In fact -- if you take away enough pressure, you can get your liquid to boil without even lighting a match.

Answer 7

For boiling to occur, the substance changes to gaseous state below the liquid's surface. Since it is a gas within a liquid it appears as bubbles. For bubbles to form their outwards pressure must exceed the atmospheric pressure. Therefore, the highes the atmospheric pressure the higher the boling point.

Answer 8

Boiling occurs when the vapour pressure reaches the prevailing pressure. This temperature will decrease as pressure is lowered from atmospheric and increase as pressure is raised.

Answer 9

Boiling point depends on the pressure. At ground level say water boils at 100degC. As we climb to a feature with height it may boil at say 60degC.As the pressure drops boiling point decreases.

Answer 10

Bp = temp when vapor pressure = atmospheric pressure