writing a survival novel where a guy needs to survive and needs to make water to do so. It is on another planet and he access to sci-fi type manufacturing machines that can make most tings.
He has a supply of O2 and a supply of H2, lets assume at a reasonable temperature.
My understanding is that you mix the two together (preferrably two to one) and ignite it and this produces water in a sort of chain reaction.
Assuming this is done in an inclosed space, does all the H2 and O2 turn into water? Is the chamber left in a vacuum state or close to it after? There is a lot of heat involved in this process I believe, does that mean the water comes out in the form of steam, or does something about this process end up cooling it into water droplets?
I figure I need to get the answers to some of these questions to be able go about creating a believable scenario. BTW, please forgive me ahead of time, my chemistry knowledge is basically non-existent, I got what little I know here from googling.
As EdV mentioned in the comments, not premixing the gasses and them suppying them to an intense flame, will get the desired results without any unwanted explosions. The result will be steam and a lot of heat.