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A comment on Phosphine detected in the atmosphere of Venus – an indicator of possible life?. Parent comment

Re:Phosphine detected in the atmosphere of Venus – an indica... by 3pt14159 on Monday September 14, 2020 @10:28AM (#24470549)
Last time I checked, which was about four years ago, the conditions on Venus 40km were such that humans could walk around outside with nothing more than an oxygen supply.
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Re:Phosphine detected in the atmosphere of Venus – an indica... by dragonwriter on Monday September 14, 2020 @06:14PM (#24475751)
> the conditions on Venus 40km were such that humans could walk around outside with nothing more than an oxygen supply.

The Wikipedia page on Venus's atmosphere suggests that at that altitude Venus's atmosphere is a sulphuric acid haze at 110°C and about 2atm of pressure, which, even if there was something to walk on, doesn't sound like you'd be able to walk around with just an oxygen supply for very long.

https://en.m.wikipedia.org/wiki/Atmosphere_of_Venus

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Re:Phosphine detected in the atmosphere of Venus – an indica... by cdelsolar on Monday September 14, 2020 @11:29AM (#24471309)
well i'm not sure they could "walk around" on gas...
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Re:Phosphine detected in the atmosphere of Venus – an indica... by LostTrackHowM on Monday September 14, 2020 @12:20PM (#24471954)
Zeppelins and jetpacks!
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Re:Phosphine detected in the atmosphere of Venus – an indica... by metalliqaz on Monday September 14, 2020 @10:42AM (#24470703)
that is true although there is also a ton of acid up there
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Re:Phosphine detected in the atmosphere of Venus – an indica... by Symmetry on Monday September 14, 2020 @12:41PM (#24472191)
At 50 km up only 7 ppm

https://selenianboondocks.com/2013/11/venus-isru-what-do-we-...

Which as far as I can tell isn't terrible if you don't breath it in and if you do the official allowed exposure time is 10 minutes for 5 ppm. I would recommend you wear goggles in addition to breathing equipment, though.

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Re:Phosphine detected in the atmosphere of Venus – an indica... by dragonwriter on Monday September 14, 2020 @06:17PM (#24475788)
> Which as far as I can tell isn't terrible if you don't breath it in and if you do the official allowed exposure time is 10 minutes for 5 ppm.

Presumably that's 5ppm under terrestrial conditions, Venus at 40km has substantially higher pressure, more than is explained by the higher temperature alone, so any given ppm is a greater number of molecules per cm³, right?

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Re:Phosphine detected in the atmosphere of Venus – an indica... by kortex on Monday September 14, 2020 @04:20PM (#24474663)
7 ppm of atomized H2SO4 will definitely sting a bit. That's roughly 7 g/m^3, TLV for sulfuric acid mist is 1 mg/m^3. Survivable but you would want to minimize time in it.
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