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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

Mark,
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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