Mike in Mystic wrote:
Hi Ed,

The oxygen in the water isn't coming from the propane, it's coming
from the air. 2 of the mass units in water are from propane, but 16
(the oxygen) are from air. If you work it out stochiometrically it
makes sense.
Mike

"Edwin Pawlowski" wrote in message
. com...
Robert Bonomi wrote:
It's all in how you measure things --

One lb of propane, when burned, creates approximately 2-1/4 lbs of
water (in vapor form, of course.) This is roughly 35 fl.oz.

OK, but Robert says it "creates" water in vapor form. If it is in the air,
it is vapor and does not have to be created. Raising the temperature changes
the relative humidity and the dew point and thus the condensation. If there
is water in the propane it can be released to the air in the form of vapor.
Or a chemcial reaction can change one physical item to another, such as milk
into cheese. I just don't know of any mass that can be changed to another
form and make a greater mass though.
--
Ed

http://pages.cthome.net/edhome