Each individual molecule did reach an excited state and entered the air, as the air molecules themselves are already highly excited. Also, if the air already has enough moisture then the moisture molecules in the air can accumulate on surfaces that are cold enough that they lose their excited state energy, and a puddle could remain even in warm temperatures because as water leaves the puddle more can also accumulate there.
Anon questions physics
Submitted 2 years ago by Early_To_Risa@sh.itjust.works to greentext@sh.itjust.works
https://sh.itjust.works/pictrs/image/54cba7e3-231a-4c4d-a653-fc3915d3ed2d.png
Comments
finitebanjo@lemmy.world 2 years ago
RegalPotoo@lemmy.world 2 years ago
Also diffusion and vapor pressure and latent heat - reality is messy
thefartographer@lemm.ee 2 years ago
Someone needs to clean up this fucking sim, the rules make no sense
Aceticon@lemmy.world 2 years ago
Hence why there’s “boiling” and there’s “evaporating” - two things that aren’t the same hence two different words.
SorteKanin@feddit.dk 2 years ago
My chemistry teacher once explained it to me like below. Does anyone know how much truth there is to this explanation?
Temperature as measured by a thermometer or your finger is an average. Not every single molecule has the same temperature. The molecules constantly bounce around, smashing into each other, transferring heat to each other. By chance, some molecules will get hit in just the right way by other molecules to reach a very high temperature and then it evaporates. So there is constantly a gradient of temperatures among the molecules and the ones with the highest temperature are the ones evaporating, until there is no liquid left at all.
As the average temperature increases, the chance of some molecules reaching a high enough temperature also increases, so warm water evaporates faster than cold water.
This also explains why evaporation cools down (like when you sweat): the molecules with the highest temperature are the ones evaporating, so the average temperature decreases as those high-temperature molecules leave the system. Only the relatively colder molecules are left behind - thus it cools as a whole.
dwindling7373@feddit.it 2 years ago
I think it’s much easier and truthful to stop talking about temperature and introduce speed in that context.
The average speed is what we percieve as temperature, but single moluce can be fast, so fast as to break the boundaries of the liquid pool and shoot up toward space.
Single unbounded molecules are what gas is.
SorteKanin@feddit.dk 2 years ago
But temperature is not just the speed of a molecule right? Like a molecule moving very fast through space can still be at a very low temperature, right?
Snowclone@lemmy.world 2 years ago
Next explain what mass is in 10,000 words or less. I know two whole ass physics classes aren’t enough, so. I’m trying to be generous.
BehindTheBarrier@programming.dev 2 years ago
There’s a bit more to it, but it’s because of this effect.
There is actually a balance between liquid and gas state, just overwhelmingly in favor of liquid when at normal temperatures. There is a ratio of molecules that will hit each other and transition to gas, and an equal amount gas hitting liquid and condensing. At least when there is a balance between the two sides, aka 100% moisture in the air. Which is not how it is most places.
Normally there is always evaporated water in the air, and anything that evaporated will be moved away in any mildy ventilated area, as you say, it leaves the system. So it never reaches a balance, which is why things dry up at lower temps as water will always evaporate and leave the system.
celsiustimeline@lemmy.dbzer0.com 2 years ago
Ahh yes, the phenomenon of “somebody cleaned up your dickhead mess you made”.
Ashelyn@lemmy.blahaj.zone 2 years ago
In dry climates, the water actually will dry itself relatively quickly as long as there’s not an overwhelming amount. In more humid areas though, yup.
sugar_in_your_tea@sh.itjust.works 2 years ago
Yup, I live in a desert climate and only clean up big puddles. Anything that doesn’t make a splash when I step on it will be gone in under an hour.
Asafum@feddit.nl 2 years ago
Well, water does evaporate at less than 212° at the surface. It’s just that the entirety of a pot of water will boil if it reaches 212.
Just think about puddles or whatever after rain on a metallic surface or concrete. It’s not entirely being absorbed or cleaned up by anyone.
Snowclone@lemmy.world 2 years ago
Sounds like the magic table that cleans your plates.
Gullible@sh.itjust.works 2 years ago
>go into grocery store
>find both sexy and repulsive peopleWhat the hell, since when have people been ahomogenous?
Zagorath@aussie.zone 2 years ago
Hey, who are you calling gay‽
thefartographer@lemm.ee 2 years ago
Some genius
Dasus@lemmy.world 2 years ago
ahomogenous
You mean heterogeneous, lol.
Gullible@sh.itjust.works 2 years ago
Apologies, I meant to write “contrahomogenous”
Tangentism@sh.itjust.works 2 years ago
Anon doesn’t realise that his mum cleared it up. Bet they think there’s fridge fairies as well!
Couldbealeotard@lemmy.world 2 years ago
I used to have this magic basket. I would put dirty clothes in, and later those clothes would turn up clean
MBM@lemmings.world 2 years ago
sugar_in_your_tea@sh.itjust.works 2 years ago
And folded.
echodot@feddit.uk 2 years ago
What exactly is this idiot suggesting some sort of conspiracy to hide all the water?
Obviously the water fairies take it.
ChickenLadyLovesLife@lemmy.world 2 years ago
Bigfoot gotta drink something.
julysfire@lemmy.world 2 years ago
Big Science doesn’t want you to know this one simple trick.
Phoenicianpirate@lemm.ee 2 years ago
Some asshole needs to remind him of something called evaporation and vapor pressure…
Agent641@lemmy.world 2 years ago
Triple point.
If 3people point at some spilled water, it will evaporate in a few hours
Rooskie91@discuss.online 2 years ago
This is your friendly reminder that the majority of people on the Internet are children.
TriflingToad@lemmy.world 2 years ago
I don’t believe that, I just think the children are more vocal.
eran_morad@lemmy.world 2 years ago
Homie should have paid attention in physical chemistry.
absGeekNZ@lemmy.nz 2 years ago
That is one bold assumption right there.
Mango@lemmy.world 2 years ago
In case anyone here hasn’t heard the news: news.mit.edu/…/surprising-finding-light-makes-wat…
echodot@feddit.uk 2 years ago
That’s not surprising. That’s just how electromagnetism works
Klear@lemmy.world 2 years ago
Fucking magnets.
Mango@lemmy.world 2 years ago
Oh yeah, I’m sure you know all along and just didn’t want to help with desalinization efforts.
psud@aussie.zone 2 years ago
The reason being that at any temperature where a liquid can be a gas (over zero degrees Celsius at standard pressure) some of that liquid will become gas.
Over time all of the liquid will become gas
echodot@feddit.uk 2 years ago
And the reason for that is because the concept of temperature doesn’t really work when you’re talking about individual molecules. The outside temperature might be 10° C but an individual molecule may very well get up to boiling of course at that scale it doesn’t really do anything other than disassociate itself from its neighbors.
Corno@lemm.ee 2 years ago
Vapor pressure: “Am I a joke to you?”
Jokes aside, the boiling point exists because as the temperature of the water increases, so does its vapor pressure. At the boiling point, the vapor pressure becomes equal to the atmospheric pressure (1 standard atmosphere, or 760 torr). This is the reason why water boils at lower temperatures at higher altitudes!
whydudothatdrcrane@lemmy.ml 2 years ago
He rather questions modus ponens? Things can have many causes, that is why the presence of the effect in absence of the cause does not mean there isn’t a causal effect. Rain makes grass wet, even if the grass is wet without it having rained first, because there are presumably many reasons the grass can be wet (eg sprinklers), even if they are unknown to us. That having been said, this specimen is a hilarious face palm, all the same.
hate2bme@lemmy.world 2 years ago
OP took the bait.
sxan@midwest.social 2 years ago
The water thought you were so stupid, it left.
OwlPaste@lemmy.world 2 years ago
Only scientifically correct answer :D