The guy doing the experiment is a con man. The reaction that takes place when you drop Alka Seltzer in water is exothermic. That means it gives off heat.
Any high school chemistry student should have been able to see right through it, but you fell for it.
There is more than one problem with this experiment. Sure, when Bicarbonate and Citric acid react it`s slightly exothermic but that heat energy is not converted into an elevated temperature and is used when the CO2 expands in the bottle...and then the problems start which make pure nonsense of the comparison what goes on in a rubber stoppered bottle containing at the least a lethal CO2 concentration if not > 90 % CO2 irradiated with a heat lamp which is at least 100 Watts if not more from a distance of what did he say,...40 cm..
It`s no problem whatsoever to get rid of all the CO2 in a rubber stoppered bottle. All You have to do is add a bit of lime or caustic soda, shake it and You have air with no CO2 in this bottle.
Then You take a second bottle with an equal amount of water, no CO2 trapping chemical and above it air with ~ 380 ppm CO2.
There is a reason why nobody does an experiment like that and instead uses 800 000 ppm CO2 or more.
Several things happen which don`t happen with less than 1000 ppm CO2.
The refractive index of the concentrated CO2 gas is much higher and with the curved bottle surface You get a lens effect.
Concentrated CO2 has a much lower specific heat than air.
CO2 has at room temperature a CP of only 0.85 kJ/kg-K while air has 1.006 KJ/kg-K...so it takes 15 % less heat energy to heat up an equal mass of concentrated CO2 gas than an equal mass of air...and the difference between just air and air with 380 ppm CO2 would not even register..!!!!
The other even larger problem is that any gas that absorbs heat ENERGY only heats up (in terms of Temperature) if You don`t let it freely expand.
There is no way any gas in an open system like the air outside heats up at the same rate with the same amount of radiant heat ENERGY as it does in a closed system like a bottle with a rubber stopper.
Last not least, would that heat lamp which is supposed to represent the sun still "heat" the CO2 in that bottle if it would have to shine through a path with enough CO2 to absorb all the energy that CO2 can absorb to begin with..??...as the sun has to on the down path through the entire atmosphere. But as soon as You point out that "little discrepancy" between the real thing and silly midway magician experiments like that the believers switch the topic to "black body radiation" and "back radiation"...in which the air above which is colder than the "black body" manages to heat the "black body" to an even higher temperature.
So first let`s see an ACTUAL experiment (not just Roy Spencer`s "thought experiment" which demonstrates just that.
There is no way that this "back radiation" with which CO2 allegedly bombards our planet with "extra heat" can make up for the entire amount of heat energy the CO2 at high altitude strips from the incoming sunlight.
None of that is taken into account in any of these "experiments" designed to scare school kids and house wives with stoppered coke bottles full of concentrated CO2 directly in front of a heat lamp powerful enough to roast chickens...
That guy with his heat lamp and 2 rubber stoppered coke bottles in which he dropped a pile of Alka Seltzer tabs should be confronted with his own "evidence" that supposedly proved man made global warming...:
Any of the graphs they brandish show temperature in a direct, therefore linear relation with ppm CO2.
He had at the least 800 000 ppm CO2 in that bottle and recorded an 8.9 deg C temperature increase with his chicken roaster heat lamp.
That`s 8.9 / 800 000 = 0.000011125 deg C per ppm CO2 or according to this "experiment" accounts for 0.0042275 deg C on the above "man made global warming" graph.
And if he argues that the temperature increase for 800 000 ppm is dis-proportional to the 380 ppm "global warming evidence" graph,...then why the **** is he making a video with a corked bottle of concentrated CO2 instead of a bottle with 380 ppm and another one with either 0 or just half, 190 ppm CO2.
I`ld even let him use his chicken roaster lamp directly in front of the bottles again..and even be magnanimous about the rubber stoppers
It`s no trouble at all to do a real "green house" experiment doubling the CO2 concentration, but I would insist that there is no roof on the green house...then again that has been tried out already but nobody wants to talk about it,...because inside the walls it did not get any warmer than outside.
And by the way all the extinction level events we know of were a result of global cooling...not global warming
You don`t even have to go to that extreme. Just look at which regions have the highest population, man beast or plant, no matter which they all thrive in the warmer regions. And in the not so distant past Greenland was one of these regions.