[dylan604]

Have you ever actually seen a canister of hydrogen? Specifically, have you ever felt the weight of that canister? I'd rather just carry the 8lbs of a gallon of water. At least it gets lighter as the water is depleted

[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

[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 ¯\_(:))_/¯

[whatshisface]

Carbon is lighter than oxygen, so their plan would work if they brought fully saturated hydrocarbons including ones so long-chain that they were solid at room temperature.

[dylan604]

You just described coal. So, you're suggesting taking coal on a backpacking trip along with a very heavy canister of hydrogen. To make water? Anything else you want to do to help destroy the environment you're backpacking through?

You realize this whole thread started with the concept of dehydrated water, right?

[whatshisface]

Saturated hydrocarbons contain hydrogen. That is what the carbon is saturated with. Coal is not saturated.

[sp332]

Just put the hydrogen in a balloon and it will carry itself.

[dylan604]

Just remember, the flame from hydrogen is clear and very hard to see until it catches other things on fire. At that point, it's well past too late

[toast0]

Just need a longer string for the balloon and it'll be ok. And hike in places with less trees (although, after a few mishaps, the trails you frequent will have less trees, too).