Question about rust

Thanks, that makes sense. It is not "created", but more air is drawn in and the moisture is a higher concentration.

Reply to
Edwin Pawlowski
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Yes, it does. Water vapor is one of the combustion byproducts of burning propane -- and of burning nearly anything else that contains hydrogen.

The fact that there is water vapor already present in the air is not relevant. Burning propane adds more water vapor to what is already there.

Adding more water vapor to the air also changes the relative humidity, but in the opposite direction.

No, the water is not in the propane. It is created by chemical reaction when the propane is burnt.

The propane is not merely being changed into another form. The carbon and hydrogen in the propane are being chemically combined with oxygen to form carbon dioxide, water vapor, and probably small amounts of carbon monoxide as well. The mass of these compounds is precisely equal to the *combined* masses of the propane *and* the oxygen it combines with -- which clearly is *greater* than the mass of the propane alone.

-- Doug Miller (alphageek at milmac dot com)

How come we choose from just two people to run for president and 50 for Miss America?

Reply to
Doug Miller

snipped-for-privacy@host122.r-bonomi.com (Robert Bonomi) wrote in news:6587$4014d6f8$44a75e7a$ snipped-for-privacy@msgid.meganewsservers.com:

Thank you! Excellent explanation. It should end all debate on the matter. But since when have the facts stoped someone from arguing?

Reply to
Joe Willmann

Good point. THat means you can throw a tarp over yout heavy iron and put a dehumidifier underneath it and things should stay warm and dry.

Reply to
Fred the Red Shirt

Ok, this makes much sense. It was not the facts, but the limited explanation in question. It sounded like mass was being created, but it is only changing form. Ed (but I'm still not looking forward to the exam on Friday)

Reply to
Edwin Pawlowski

Robert Bonomi wrote

The metric crowd uses joules, not calories (1 cal = 4.184 J). See the official SI website:

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heat energy in metric terms is 2,260 J/kg (also 2,260 J/L). The energy from condensing a cupful would illuminate a lightbulb for 9 seconds.

Reply to
Pat Norton

This is what was not clear. We're not making something from nothing.

Reply to
Edwin Pawlowski

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