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Re: atmos to elevation conversion

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Posted By<" ">J. Bal on September 04, 2002 at 05:35:10:

In Reply to: atmos to elevation conversion posted byMark Cralle on August 28, 2002 at 16:49:44:

: My roommate were talking about at what elevation
: you would have to be at for water to boil at room temp. (75 deg f for us)
: I figured out that P1/P2=T1/T2 and came up with 0.796 atmos.
: But I dont know how to get that to an elevation above sea level.
: Any one no the answer and can you explan a little.

: P.S. Keep it fairly simple im just a draftsman!

: Thanks,

: Mark W. Cralle

It does not work like that. In order for it to boil the
atmospheric pressure has to be equal or larger
than the vapor pressure for water @ 75 deg F which
is approximately 0.5 pounds per square inch. So,
you will need to go to an elevation where the
pressure is 0.5/14.7 = 0.034 atmos. !!(space shuttle altitude?)

Hope this helps,
Joe Bal

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