On Fri, 31 Oct 2008 12:00:14 -0700, John M. wrote:

On Oct 31, 7:26 pm, Bill Ward wrote:
On Fri, 31 Oct 2008 08:36:36 -0700, Bolaleman wrote:
On Oct 31, 6:07 am, chemist wrote:
On Oct 31, 1:45 am, Roger Coppock wrote:

The TV science series "Mythbusters" did a "Young Scientists
Special."
It aired on 4/26/08 (Season 6, Episode 8). One of the items they
put to the test was greenhouse gas theory. They made 4 large
rectangular chambers added CO2 to one, CH4 to another, and used the
remaining two for controls.

They simulated the Earth by shining a light through the clear mylar
on one side onto a black painted surface at the other side. the
greenhouse gas chambers were warmer and melted more ice than the
control groups. They confirmed that CO2 and CH4 can cause
greenhouse warming.

Tom Bolger should look at this demonstration to see how to do this
correctly. He's failed too many times and he needs help.

I found my copy on the LImewire™ network. This episode is
probably also available on DVD. Please see:

http://www.imdb.com/title/tt1225053/

Give us more detail such as
were the containers open.
METHANE DOES NOT WARM FASTER THAN AIR.
Chemist, here is the reason:
When heat is lost to the air, some is absorbed by nitrogen, some is
absorbed by oxygen, and a tiny amount is absorbed by argon, carbon
dioxide, water vapor, and trace gases. You can write:

Heat absorbed by one mole of air = heat absorbed by O2 + heat absorbed
by N2 + ...
= xO2Cp(O2) T + xN2Cp(N2) T + ...

where xO2 and xN2 are moles of oxygen and moles of nitrogen per mole
of air, and Cp(O2) and Cp(N2) are the constant pressure molar heat
capacites for pure oxygen and nitrogen gases.

Assuming that air is 21% oxygen, and 79% nitrogen by volume. If you
can assume that the air behaves ideally, Avogadro's law says that the
volume fraction for each gas is also its mole fraction. However, gases
like CO2, H2O and methane (CH4) do not behave like an ideal gas.

As O2 and N2 are di-atomic gases, but CO2, H2O and methane are three-
and four- atomic gases, they have more degrees of freedom, i.e.
infrared energy can be converted more easily into intra-molecular
atomic vibrations which is equal kinetic energy or heat energy. As a
result, these gases (including water as vapor) are heated up more
easily than oxygen and nitrogen by Infrared (IR) radiation. This
conversion of radiation energy to kinetic energy by the way is the
principal of IR spectroscopy. The higher energetic ultraviolet
radiation (UV) is causing excitations of outer electrons (used for
instance in the UV spectroscopy). This “absorbed” energy can be
converted partially in kinetic swinging energy (resulting in heat
production) and partially is emitted again as radiation energy.

Fine, but IR has nothing to do with it. The experiment heated the gases
by conduction and convection from the black background.

So the atmosphere is not heated at all by conduction and convection?
sarcasm

Even back in the 1850's, Tyndall pointed out the need to keep
the radiation source and detectors completely thermally isolated from
the sample gas. It's still true.

Golly jeepers. The Laws of Physics didn't change in 150 years. Oh, except
that CO2 stopped being a GHG for some strange reason more sarcasm

Those demonstrations do not show anything but the density and thermal
properties of the gases.

Did nobody tell this clod that molecular rotation and vibration, along
with translation, are thermal properties of gases. no sarcasm

They are being shown to gullible children as propaganda.

You mean like in bible classes further sarcasm

John seems to be losing it. Maybe it's related to the climate cooling
down.