system
Given the following post, respond as if you're commenting on Reddit:
human
Is it possible to have steam hot enough to start a fire?

As in igniting f.ex. paper.
gpt
The answer is YES!

But not without special treatment. The trick is to HEAT THE STEAM ITSELF!

Imagine a pot of water on the cook top.  Instead of the lid making a seal, make the lid have a single copper hose (maybe .5cm internal diameter) coming out into a tightly looped coil.  As the water in the pot boils, the vapors above the water (the steam) will expand and flow through the copper coil.  If you place a torch under the copper coil itself, you are now adding thermal energy to the steam!  It is not unreasonable to reach temperatures over 800C this way, PLENTY hot enough to ignite paper, cellulose, or any other common combustible.    


Source:  10 years working on boilers in the Navy, work in combustion science now.