In article , "Leon" wrote:


Doug Miller wrote:
In article , "Leon"
wrote:


You are on the right track.
Actually the compressed air does not create the condensation. It is
the heat generated from compressing the humid air that causes the
condensation.

Incorrect. It is *exactly* the compression that causes the condensation:
water that is vapor at ambient pressure can be condensed into liquid by
increasing the pressure.

So Doug, I suspect you believe it is the pressure from "your firm grip" on
a glass of ice water that causes the warm humid air surrounding the glass to
cause condensation on the cool side of the glass.

Of course not. Vapor condenses as a result of being compressed, or cooled, or
both -- but never as a result of being heated. Warm humid air surrounding a
glass of ice water produces condensation on the side of the glass because the
temperature of the surface of the glass is below the dew point. The water
vapor condenses because it is cooled.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.