For that matter, if Harry thought to try it in violation of most of the safety lecture, he might have better treated her. It depends on how much accurate biochemistry Harry knows- and what happens when CO2 transfigured into oxygen which burns more carbon refigures in the bloodstream. Although Harry has demonstrated the ability to sustain long transfigurations, I would say that it's reasonable that he thinks his medical supplies are more likely to work than experimental medical magic.
My guess: Oodles of carbon monoxide. Not good.
EDIT Gah, I can't believe I got this wrong what with all the yeast metabolism I've been working with lately. All the oxygen you consume goes into making water, the CO2 you breathe out comes entirely from a combination of whatever carbon source you are burning and a little tiny bit of your water, with your mitochondria ripping electrons from the latter and adding it to the former. So somehow the water would wind up with carbon in it... CH2O? Formaldehyde? And that's not even considering what'll happen to all the molecules that have had OH groups tacked on taken from water over the intervening time period...
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 88-89. The previous thread has passed 500 comments.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: