does boiling point temperature increase or decrease with increase of altitude?

[Smooth Operater]

does boiling point temperature increase or decrease with increase of altitude?

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[denticus]

does boiling point temperature increase or decrease with increase of altitude?

I think it increases because of the higher atmospheric pressure so that gasses would rather stay as solution. Don't quote me on that.

 

[delsol7]

Higher the altitude, lower the boiling point. (Higher the altitude, lower the pressure)
Boiling point is basically you are equaling surrounding pressure with vapor pressore of solvent. If environment pressure is lower solvent will boil at lower temperature.
That's why when you cook up in the high mountain, though water is boiling, your food is not 100% cooked due to water boiling at lower temperature.

 

[doc toothache]

does boiling point temperature increase or decrease with increase of altitude?

I think it increases because of the higher atmospheric pressure so that gasses would rather stay as solution. Don't quote me on that.

The atmospheric pressure decreases at higher altitude.

 

[Air head]

Delsol's got it right.

Always remember that as altitude increases, ambient air pressure decreases, and as air pressure decreases, so does boiling point.

 

[denticus]

Delsol's got it right.

Always remember that as altitude increases, ambient air pressure decreases, and as air pressure decreases, so does boiling point.

I stand "dumb"founded. Been a while since I studied for the DAT...errr.

 

[predentlove]

kok makes sense

 

[HannibalLecter]

Why the atmospheric pressure decreases as you go up?

Since barometric pressure is a measure of weight of the air molecules above it. The atmospheric pressure on ground is a lot more than say if it were on top of a mountain where there are less air molecules.

Why the boiling point would be lower as the atmospheric pressure is lowered?

Boiling point definition says that a liquid molecule will go into the gas phase only if the vapor pressure above it equals the atmospheric pressure. Since the gas molecules/water molecules don't really change in composition if you take that solution up to a mountain vapor pressure will stay the same. But the atmospheric pressure is lowered thus it will take less of a boiling point:

http://en.wikipedia.org/wiki/File:Water_vapor_pressure_graph.jpg