Monday, August 10, 2015

More AGW discussion

I know you people love this.  Bwah, hah, hah.

Spent a little time on the subject of heat capacity.  Did you know that water has twice the heat capacity of carbon dioxide?  Three fourths of the Earth's surface is covered by water, as opposed to the 1/25th of 1 percent of the atmosphere that is carbon dioxide. ( 400 parts per million )  Kinda like comparing an elephant's weight to a feather's weight.

Did you know that a five gallon can of pure carbon dioxide has half of the heat capacity of 50 milliliters of water?  ( rough guess by the way.  These are molar numbers.  One mole of carbon dioxide gas will fill the gas can, and 50 milliliters of water is maybe a tablespoon)  Keep in mind that the atmosphere isn't pure carbon dioxide and that water is everywhere.

Keep in mind the little experiment I did earlier.  A pound of water will boil ( on a 1kw burner)  in 3 minutes and return to room temperature in an hour.  That means that carbon dioxide will hold that much heat for about half as long.  But since it is also subject to the gas laws, it will dissipate most of that heat in expansion, as gases expand a lot when heated.

So, the feather, which weighs almost nothing can move the elephant, which weighs several tons.  Psst!  I've got a bridge to sell ya!  Cheap!

You can believe that an elephant can be supported by a feather if that pleases you, but that seems improbable to me.


By the way, I looked up the weight of the atmosphere and the weight of the oceans.  The oceans weigh about a million times more than the atmosphere.  And water is twice as good as holding heat.  But we cannot regulate, nor tax the oceans.


A feather weighs about half a gram.  Since the weight of the oceans is 1 million times that of the atmosphere, and of the atmosphere only 4/10000ths of that is carbon dioxide, and only half of that is from human activity, then that means that the ratio is about 2 billion to 1.  So, two billion feathers weight about 1 billion grams, which is about 1 million kilograms, which is about 2.2 million pounds.  About half the weight of the shuttle in comparison to a feather.


Correcting the math a bit, ya'll.  It looks like it is more than the weight of a shuttle fully loaded up.

Another comment: the heat capacity of the carbon dioxide compared to oxygen is really not that much different.  Keep in mind that burning fossil fuels replaces the oxygen with carbon dioxide.  So, the measurement of heat retention is only that which exceeds what was already there.  It's not very much.

Maybe that can now be adjusted to the whole fleet of shuttles.  Any other adjustments would likely be of the same kind.  You get the picture, doncha?

Update:  8/13/15

Looks like a mathematics goof.   Forget about the shuttles and such, it is a much smaller number.

No comments: