Question:
I need a formula to calculate the saturation point of air (water in air vapor in air) at various temperatures and pressures. I have tables and
graphs of such things but would like a formula. Thanks

Replies:
I do not think there is a formula. At least not anything
that you would not need hundreds of hours of computer time
to figure out. Just use the tables - they were obtained
from experiments, and so should be correct!

Arthur Smith
Actually, you always "fit" the numbers in tables to get
a formula out of them - a common form of fitting is
polynomial regression, which you should be able to find in
any reasonably good computer graphics program (let me know
if you cannot find such a thing).

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