CO2 quotes
Dead Paul
http://ocii.com/~dpwozney/carbondioxidequotes.htm
http://vulcan.wr.usgs.gov/Glossary/Emissions/Publications/OFR95-85/OFR95-85.html
“One of the most serious hazards occurs when volcanoes emit large
quantities of carbon dioxide. Carbon dioxide is heavier than air and
collects in low spots, displacing air in these locations. Hundreds of
people have died of carbon dioxide asphyxiation near volcanoes in the past
two decades, most of them in Cameroon, Africa, and in Indonesia.”
http://www.boc-gases.com/products_and_services/by_product/carbon_dioxide
“Carbon dioxide is an inert gas that can cause oxygen depletion inducing
asphyxiation and death. The risk of asphyxiation is exacerbated by the
fact that carbon dioxide is heavier than air which allows it to flow
downwards and collect in low lying areas far from its origin.”
http://www.madehow.com/Volume-1/Baking-Soda.html
“In addition to its many home uses, baking soda also has many industrial
applications. For instance, baking soda releases carbon dioxide when
heated. Since carbon dioxide is heavier than air, it can smother flames by
keeping oxygen out, making sodium bicarbonate a useful agent in fire
extinguishers.”
http://hvo.wr.usgs.gov/volcanowatch/2005/05_06_02.html
“Because CO2 is heavier than air, it doesn't readily rise into the
atmosphere and, instead, tends to pool in low areas.”
http://volcano.oregonstate.edu/vwdocs/frequent_questions/grp7/africa/question627.html
“Carbon dioxide is denser than air, so it hugged the ground and flowed
down the stream valley that leads away from the lake. Unfortunately many
homes and at least one town are also along this valley and the inhabitants
were caught by this cloud of ground-hugging gas.”
http://www.ens-newswire.com/ens/nov2005/2005-11-04-09.asp
“Zhang said, ‘Carbon dioxide is denser than air, so it settled down
and flowed along the river valley, choking people and animals to
death.’”
http://www.freepatentsonline.com/5394643.html
“The carbon dioxide settles as a layer at the floor of the space.”
http://www.exo.net/~pauld/lectures/italy/marslectureshort.htm
“Carbon dioxide is heavier than air and so it sinks into the tank and
stays there.”
http://www.ibiblio.org/pub/academic/agriculture/entomology/beekeeping/bee-l/log9911a.txt
“In a place with no air movement like the bottom of a dry well, if you
put a lot of organic materials there to rot, Carbon Dioxide will
accumulate at the bottom and it will displace the air.”
<snip/fair use>
More quotes at the original website.
AndyW
news:hgaa1q$saa$1...@news.datemas.de...
>
> http://ocii.com/~dpwozney/carbondioxidequotes.htm
True but misleading.
CO2 is heavier than air but it only pools when released en mass after a
while it mixes with the air and rises.
There is the implication that somehow, since CO2 is heavier than air, it
cannot rise in the atmosphere and cause the greenhouse effect. This is
patently ridiculous otherwise we and other oxygen breathers who live on the
planet would suffocate in the CO2 layer clinging to the surface of the
earth.
Andy
Dead Paul
Yeah agreed but CO2 is absorbed at ground and sea level too.
Bob Ferguson
"Dead Paul" <dead...@no.reply> wrote in message
news:hgaa1q$saa$1...@news.datemas.de...
>
>
>
> http://vulcan.wr.usgs.gov/Glossary/Emissions/Publications/OFR95-85/OFR95-85.html
>
> "One of the most serious hazards occurs when volcanoes emit large
> quantities of carbon dioxide. Carbon dioxide is heavier than air and
> collects in low spots, displacing air in these locations. Hundreds of
> people have died of carbon dioxide asphyxiation near volcanoes in the past
> two decades, most of them in Cameroon, Africa, and in Indonesia."
>
>
>
> http://www.boc-gases.com/products_and_services/by_product/carbon_dioxide
>
> "Carbon dioxide is an inert gas that can cause oxygen depletion inducing
> asphyxiation and death. The risk of asphyxiation is exacerbated by the
> fact that carbon dioxide is heavier than air which allows it to flow
> downwards and collect in low lying areas far from its origin."
>
Carbon Dioxide is *not* an inert gas. It supports combustion of burning
magnesium, for example.
Bob Ferguson
"Dead Paul" <dead...@no.reply> wrote in message
news:hgaa1q$saa$1...@news.datemas.de...
>
>
>
> http://vulcan.wr.usgs.gov/Glossary/Emissions/Publications/OFR95-85/OFR95-85.html
>
> "One of the most serious hazards occurs when volcanoes emit large
> quantities of carbon dioxide. Carbon dioxide is heavier than air and
> collects in low spots, displacing air in these locations. Hundreds of
> people have died of carbon dioxide asphyxiation near volcanoes in the past
> two decades, most of them in Cameroon, Africa, and in Indonesia."
>
[snipped: all the rest]
Although CO2 is heavier than air and it will accumulate in depressions when
first released, it nevertheless mixes with the air layer above it within a
very short space of time to form a relatively homogeneous mixture of gases.
Francis Burton
Bob Ferguson <robert....@google.co.uk> wrote:
>"Dead Paul" <dead...@no.reply> wrote in message
>news:hgaa1q$saa$1...@news.datemas.de...
>> asphyxiation and death. The risk of asphyxiation is exacerbated by the
>> fact that carbon dioxide is heavier than air which allows it to flow
>> downwards and collect in low lying areas far from its origin."
>
>Carbon Dioxide is *not* an inert gas. It supports combustion of burning
>magnesium, for example.
Also, some of the CO2 that dissolves in water reacts with it to
form carbonic acid, responsible (in part) for the acidification
of oceans. Rain, even unpolluted, is slightly acidic too due to
carbon dioxide dissolving and reacting. If you inhale pure CO2,
you will get a nasty fizzy sensation in your mouth and/or nose,
again due to the carbonic acid. An inert gas would have no such
effect and would be odourless.
Francis
Bob Ferguson
"Francis Burton" <fbu...@nyx.net> wrote in message
news:12609724...@irys.nyx.net...
Mine was but a single example (which is all that is needed to disprove an
assertion).
CO2 is indeed an acidic gas and carbonic acid is one of the 4 mineral acids.
However carbonic acid is so weak that it will not even turn blue litmus
paper red. The main constituents of acid rain come from Sulphur Dioxide and
Nitrogen Dioxide which respectively when disolved in water produce Sulphuric
and Sulphurous acids and Nitric and Nitrous acids all of which are
significantly stronger than carbonic acid.
I do know that carbon dioxide is more soluble in salt water than it is in
fresh water, so the concentration of carbonic acid would be higher in sea
water if it were not for the marine life busily extracting the carbon and
releasing the oxygen.
Your last point always intruiges me because chemistry text books continue to
claim that CO2 is an *odourless* colourless gas. As you note, you are left
in little doubt that you have inhaled CO2 as it disolves in the water in the
nasal passages to give a sharp smell.
Sleepalot
>
>http://ocii.com/~dpwozney/carbondioxidequotes.htm
>
>
>http://vulcan.wr.usgs.gov/Glossary/Emissions/Publications/OFR95-85/OFR95-85.html
>
>�One of the most serious hazards occurs when volcanoes emit large
>quantities of carbon dioxide. Carbon dioxide is heavier than air and
>collects in low spots, displacing air in these locations.
The CO2 emitted by volcanoes is usually very hot, and hot air rises.
>Hundreds of people have died of carbon dioxide asphyxiation near volcanoes
> in the past two decades, most of them in Cameroon, Africa, and in Indonesia.�
I thinks it's Cameroon where CO2 bubbles up from the floor of a lake (and
hence is cool). One night, there was a big release of CO2, which collected
over the lake, and killed villagers living nearby. during the following day, the
sunlight warmed the CO2 causing it to dissipate.
--
Sleepalot
Cynic
<sleep...@yahoo.co.uk> wrote:
>I thinks it's Cameroon where CO2 bubbles up from the floor of a lake (and
>hence is cool). One night, there was a big release of CO2, which collected
>over the lake, and killed villagers living nearby. during the following day, the
>sunlight warmed the CO2 causing it to dissipate.
Yes, it is a phenomena that occurs in a few deep lakes that have high
CO2 content caused by underwater gas seepage from magma flows beneath
the lake bed. The CO2 that is dissolved in the water at the bottom of
the lake can remain dissolved only because of the pressure at that
depth. Some event stirs up the water a little, and a small amount of
the deep water rises a bit. The relaxation in pressure means that the
CO2 cannot remain dissolved and it bubbles out of solution - just the
same as when you release the pressure inside a bottle of fizzy drink
by taking the cap off.
The bubbles of CO2 obviously rise rapidly to the surface, and this
pulls more water with it, which also releases CO2 as it rises.
Surface water is pushed down around the sides of the event to replace
the water that has risen, which pushes even more of the deep water to
the surface and perpetuates the event, until the whole lake appears to
be boiling and massive amounts of CO2 rise into the air.
IIUC the event you describe the CO2 did not stay in the vally for very
long at all, because it was gone quickly enough that a few of the
people living there escaped being killed by suffocation.
--
Cynic
Sleepalot
>On Wed, 16 Dec 2009 18:21:00 +0000, Sleepalot
><sleep...@yahoo.co.uk> wrote:
>
>>I thinks it's Cameroon where CO2 bubbles up from the floor of a lake (and
>>hence is cool). One night, there was a big release of CO2, which collected
>>over the lake, and killed villagers living nearby. during the following day, the
>>sunlight warmed the CO2 causing it to dissipate.
>
>Yes, it is a phenomena that occurs in a few deep lakes that have high
>CO2 content caused by underwater gas seepage from magma flows beneath
>the lake bed. The CO2 that is dissolved in the water at the bottom of
>the lake can remain dissolved only because of the pressure at that
>depth. Some event stirs up the water a little, and a small amount of
>the deep water rises a bit. The relaxation in pressure means that the
>CO2 cannot remain dissolved and it bubbles out of solution - just the
>same as when you release the pressure inside a bottle of fizzy drink
>by taking the cap off.
>
>The bubbles of CO2 obviously rise rapidly to the surface, and this
>pulls more water with it, which also releases CO2 as it rises.
>Surface water is pushed down around the sides of the event to replace
>the water that has risen, which pushes even more of the deep water to
>the surface and perpetuates the event, until the whole lake appears to
>be boiling and massive amounts of CO2 rise into the air.
Ah, I didn't know the mechanics of it.
>IIUC the event you describe the CO2 did not stay in the vally for very
>long at all, because it was gone quickly enough that a few of the
>people living there escaped being killed by suffocation.
Yeah, dazed and confused.
--
Sleepalot
cobble
> "Dead Paul" <dead...@no.reply> wrote in message
> news:hgaa1q$saa$1...@news.datemas.de...
>>
>> http://ocii.com/~dpwozney/carbondioxidequotes.htm
>
> True but misleading.
OH YEAH REALLY?? TRY ASKING ANY OF THOSE SO CALLED "SCIENTISTS" A SIMPLE
QUESTION AND WATCH THEM SQUIRM
IT IS 0 DEGREES TODAY. TOMORROW IT WILL BE TWICE AS COLD. WHAT WILL THE
TEMPERATURE BE TOMORROW?
HUH, YEAH RIGHT, SCIENCE.
martin
2 x 0 = ?
>
> HUH, YEAH RIGHT, SCIENCE.
hmmmm
AndyW
news:M3eWm.15389$RF5....@newsfe02.ams2...
I note with interest that you have failed to provide any evidence that I
said anything wrong however as a physics graduate I class myself as a
scientist and even when I was at school I knew, by experiment, that gaseous
stratification only occurs in certain lab conditions. CO2 mixes with air in
the same way that alcohol mixes with water despite a density difference.
erhaps you would care to post you scientific observations that prove
otherwise?
Oh, left edge of the keyboard and about halfway up and you will find the key
you are looking for.
HTH
Andy
Francis Burton
cobble <cob...@example.co> wrote:
>IT IS 0 DEGREES TODAY. TOMORROW IT WILL BE TWICE AS COLD. WHAT WILL THE
>TEMPERATURE BE TOMORROW?
Assuming that "0 DEGREES" means "0 Celsius" and that twice as cold
is half as warm, the temperature will be -(273.15/2) = -136.58 C.
(If your unit is Fahrenheit, then it will -229.84 F.)
Francis
Bob Ferguson
"AndyW" <Andrew....@noJunqMailbaesystems.com> wrote in message
news:4b29dbf2$1...@glkas0286.greenlnk.net...
It's not the same way. If you put a layer of air on top of a layer of CO2,
they will remain effectively distinct for some measurable time and will
slowly diffuse together to produce a homogeneous mixture.
It is not possible to add a layer of alcohol on top of a layer of water such
that they remain distinct layers. They mix effectively instantly.
The process by which the two mix is entirely different.