magnesium in dry ice

heat + CO2 = CO + O2 and O2 is used to keep the Mg burning

I've heard that Titanium is the only element that will burn in Nitrogen. Try putting that fire out.

The guy said that a metal fire can not be extinguished by CO2. Does this mean that all metals (iron, copper, zinc, etc) will burn in carbon dioxide?

If you can first get them to burn in oxygen, then yes, I think so.

its a redox reaction just like thermite isnt it

basically yeah, just like Al can reduce iron oxide to iron and use the oxygen, magnesium can reduce the carbon dioxide to carbon and use the oxygen

Ah, the old desert sun reaction.
I'm a little bummed out it didn't show the part at the end where it will start pulsing with orange light.

The wire he torch in the beginning is Mg. He use that to ignite the Mn inside the block of dry ice.

There is a strong outflow of carbon dioxide during the reaction, so no oxygen -- or other outside gasses -- can come in. The sparks are very hot pieces of carbon being ejected. The carbon granules remaining at the end of the reaction is red hot and will burn, but not readily. Please compare my version at watch?v=EFdiMp_HzeY