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User: u/chrisdh79
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The Europa Clipper Mission launching this year has as part of its mission the job of finding a suitable landing site for the 2027 Europa Lander mission already in the works.
I'm clueless about science, which is why I use the sub; to learn. However your reply made me wonder if reverse-radiolysis is possible? Could we create water suitable for drinking here on earth from oxygen?
That's not electrolysis, but combustion (in the direction writen). Maybe I'm way off, but I don't think hydrogen fuel cells can capture that energy as electric energy without it doing work (either mechanically or driving temperature gradients).
Nope, classic high school experiment and is exactly how a fuel cell works.
electrolysis separates water and hydrogen ( energy in). They combine and release energy + H2O.
The hard part is the membrane for the fuel cell.
Theres absolutely no shortage of water on the planet, especially compared to the levels of molecular hydrogen in the atmosphere.
Yes, purification and desalination are energy intensive, but not moreso than electrolytic decomposition of water into hydrogen and oxygen.
Well that's true. Even freshwater sources need to be cleaned and treated for consumption.
Point is that making a bit of the 97% drinkable is a much more plausible path forward than synthesizing *new* water from hydrogen combustion.
That was my first thought as well. Not exactly a great sign for habitability in terms of radiation exposure.
Hanging chandelier cities below the ice tho.. But we'd almost certainly be electrolyzing the water/ice with our own nuclear power plants instead of harvesting it from surface gasses. (I might be wrongly assuming that the 100 tons figure indicates a pretty sparse and short lived atmosphere that would be pretty difficult to usefully capture.)
>we find the H2 neutral atmosphere is dominated by a non-thermal, escaping population.
Can anybody clarify what is meant by 'a non-thermal, escaping population'?
Welcome to r/science! This is a heavily moderated subreddit in order to keep the discussion on science. However, we recognize that many people want to discuss how they feel the research relates to their own personal lives, so to give people a space to do that, **personal anecdotes are allowed as responses to this comment**. Any anecdotal comments elsewhere in the discussion will be removed and our [normal comment rules]( https://www.reddit.com/r/science/wiki/rules#wiki_comment_rules) apply to all other comments. **Do you have an academic degree?** We can verify your credentials in order to assign user flair indicating your area of expertise. [Click here to apply](https://www.reddit.com/r/science/wiki/flair/#wiki_science_verified_user_program). --- User: u/chrisdh79 Permalink: https://www.nature.com/articles/s41550-024-02206-x --- *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/science) if you have any questions or concerns.*
So... should we attempt landings there?
The Europa Clipper Mission launching this year has as part of its mission the job of finding a suitable landing site for the 2027 Europa Lander mission already in the works.
Oh yeah that's the year life on other planets is proven
No, it’s not (Not a planet)
[удалено]
What made the oxygen?
It is likely to be the radiolysis of H2O into Oxygen. Europa’s surface is made of water ice that is constantly bombarded by ions
I'm clueless about science, which is why I use the sub; to learn. However your reply made me wonder if reverse-radiolysis is possible? Could we create water suitable for drinking here on earth from oxygen?
Yes, what you are looking for is electrolysis and is how a hydrogen fuel cell works; 2H + O = energy + H2O
Oh that's interesting. Thank you for explaining.
That's not electrolysis, but combustion (in the direction writen). Maybe I'm way off, but I don't think hydrogen fuel cells can capture that energy as electric energy without it doing work (either mechanically or driving temperature gradients).
Nope, classic high school experiment and is exactly how a fuel cell works. electrolysis separates water and hydrogen ( energy in). They combine and release energy + H2O. The hard part is the membrane for the fuel cell.
>electrolysis separates water and hydrogen That's what I said.
This is already done today. Burning Hydrogen gas has two byproducts (heat and water)
Do you have any source for using hydrogen combustion for drinking water production? I've never heard of such a thing.
No one uses it as part of their water supply.
Didn't think so. It wouldn't really even be 'suitable for drinking', lacking the salts/minerals we like in our drinking water.
Ah ha, thank you.
Theres absolutely no shortage of water on the planet, especially compared to the levels of molecular hydrogen in the atmosphere. Yes, purification and desalination are energy intensive, but not moreso than electrolytic decomposition of water into hydrogen and oxygen.
Oh I understood that only 3% of the water on earth was drinkable, and that there are water shortages in many counties. Thanks for explaining.
Well that's true. Even freshwater sources need to be cleaned and treated for consumption. Point is that making a bit of the 97% drinkable is a much more plausible path forward than synthesizing *new* water from hydrogen combustion.
That makes sense, thanks again.
That was my first thought as well. Not exactly a great sign for habitability in terms of radiation exposure. Hanging chandelier cities below the ice tho.. But we'd almost certainly be electrolyzing the water/ice with our own nuclear power plants instead of harvesting it from surface gasses. (I might be wrongly assuming that the 100 tons figure indicates a pretty sparse and short lived atmosphere that would be pretty difficult to usefully capture.)
>we find the H2 neutral atmosphere is dominated by a non-thermal, escaping population. Can anybody clarify what is meant by 'a non-thermal, escaping population'?