The hydrogen will be hot after the reaction, and it’ll want to go up. So I’ll let it go up the chimney, then burn it as it comes out.

Then I had to invent fire.

NASA put a lot of effort into making sure nothing here can burn. Everything is made of metal or flame-retardant plastic and the uniforms are synthetic. I needed something that could hold a flame, some kind of pilot light. I don’t have the skills to keep enough H₂ flowing to feed a flame without killing myself. Too narrow a margin there.

After a search of everyone’s personal items (hey, if they wanted privacy, they shouldn’t have abandoned me on Mars with their stuff) I found my answer.

Martinez is a devout Catholic. I knew that. What I didn’t know was he brought along a small wooden cross. I’m sure NASA gave him shit about it, but I also know Martinez is one stubborn son of a bitch.

I chipped his sacred religious item into long splinters using a pair of pliers and a screwdriver. I figure if there’s a God, He won’t mind, considering the situation I’m in.

If ruining the only religious icon I have leaves me vulnerable to Martian vampires, I’ll have to risk it.

There were plenty of wires and batteries around to make a spark. But you can’t just ignite wood with a small electric spark. So I collected ribbons of bark from local palm trees, then got a couple of sticks and rubbed them together to create enough friction to…

No not really. I vented pure oxygen at the stick and gave it a spark. It lit up like a match.

With my mini-torch in hand, I started a slow hydrazine flow. It sizzled on the iridium and disappeared. Soon I had short bursts of flame sputtering from the chimney.

The main thing I had to watch was the temperature. Hydrazine breaking down is extremely exothermic. So I did it a bit at a time, constantly watching the readout of a thermocouple I’d attached to the iridium chamber.

Point is, the process worked!

Each hydrazine tank holds a little over 50 liters, which would be enough to make 100 liters of water. I’m limited by my oxygen production, but I’m all excited now, so I’m willing to use half my reserves. Long story short, I’ll stop when the tank is half-empty, and I’ll have 50 liters of water at the end!

LOG ENTRY: SOL 34

Well, that took a really long time. I’ve been at it all night with the hydrazine. But I got the job done.

I could have finished faster, but I figured caution’s best when setting fire to rocket fuel in an enclosed space.

Boy is this place a tropical jungle now, I’ll tell ya.

It’s almost 30°C in here, and humid as all hell. I just dumped a ton of heat and 50 liters of water into the air.

During this process, the poor Hab had to be the mother of a messy toddler. It’s been replacing the oxygen I’ve used, and the water reclaimer is trying to get the humidity down to sane levels. Nothing to be done about the heat. There’s actually no air-conditioning in the Hab. Mars is cold. Getting rid of excess heat isn’t something we expected to deal with.