[ndt]

"Wouldn't this result in an ever-increasing temperature?"

Well in the case of a beaker, which I assume we must have under a heat lamp the increasing difference between outside and inside temperatures would result in an increased rate of convective heat loss to the lab. Eventually reaching a stable temperature at an ever so slightly higher temperature.

Let me guess, you are going to take a simple statement that is clearly accurate (i.e. C02 traps heat more efficiently then air) and rather then point out the flaw that you appear to think is there, you will try to question in greater and greater detail until I just go away. That about right?

So here. Just tell me what is wrong with the statement so we can cut to the chase and save both our times.

[_Jim]

I want you to explain how the 'heat trapping' takes place with CO2.

Then I would like a comparison made with water vapor.

Then we might go into how that translates into other scenarios.