[Filligree]

Well, the same amount of hydrogen (as in 1kg of water) in the form of methane only weighs ~450g though. And methane, conveniently, turns into H2O when burned.

So in principle you could carry a bottle of methane and burn that to get water. ;-)

[dylan604]

roughly half the weight, plus the weight of the burner equipment. again, that weight still remains even after the supply of fuel to make water is depleted. a just of water gets lighter. by the end of the hike, this is very much a nice quality

[Aachen]

Where do you find 550g lighters? Surely a pocket lighter to save half a kilogram of water is worth it

[dylan604]

What do you expect to do, open the valve, flick a Bic, and the water is going to start flowing? Come on. This was a fun nonsensical thread, and you're now trying to turn it into a magic trick rather than goofy science. You have to capture the flame's exhaust, pressurize it, and whatever other sciencey stuff to get the waste into a liquid

[marcosdumay]

> pressurize it

You "just" have to capture and cool it down.

I mean, it's completely outside of viability, but it's not breaking ground science. You could do it perfectly well in a lab (if you had any reason to).

[dylan604]

There's a lot of things that can be done in a lab, but bringing it to the real world is totally different. Nevermind fitting this in the original concept of backpacking

[namibj]

Liquid methane can use normal thermos technology, with the venting fed through a burner to create your water.

[Aachen]

The way I was picturing it, you light the balloon and, besides some burn marks and a boom heard miles away, water appears in its place and falls into a bucket you placed below.

Not like I know how this stuff works. Someone says methane turns into water when burned, I imagine based on farts that it floats like in a nice balloon or Hindenburg, I figure this do be how this was intended ¯\_(:))_/¯