I feel like this episode really didn’t do Oxygen justice, the fact that the video on Yttrium is almost 2x longer sort of shows this. I would love a revisiting of such an important element.
In a bit more depth, oxygen doesn't have the energy to directly combine with carbon, so that's why you don't get trees that spontaneously combust. Rather, a heat source (the smouldering splint here) provides the activation energy for the carbon to split and combine with oxygen, that in itself is exothermic, which then supplies more heat generating a chain reaction that can boil gases off which then burn in atmospheric oxygen (the flame). In the atmosphere, the nitrogen gets in the way of the oxygen which means that glowing splints cannot reach the temperature to boil off gases in the wood fast enough to re-ignite - there is simply a too low concentration of both gases and oxygen. However in the gas jar, there is so much oxygen that re-ignition is inevitable - and since more oxygen means a higher flame temperature, the gases can ignite.
AAJAA5 you say half Glass full, I say half glass empty.... Each have their own opinions... Don't force yours on to others.... Sir professor here is an immigrant too.... Doesn't mean he is bad...
I love these clips! Chemistry was my favorite subject when i still attended school. Wish i had studied it. I’m 63 now and am considering to pick it up again!
Oxygen is the second-most reactive non-metal, having reactivity almost typical of a halogen. Only because we are finely tuned for using it in respiration is it at all safe, and then only when it is about one-fifth of the atmosphere. Liquid oxygen and ozone are both very dangerous substances due to their reactivity.
Breanna Thompson you can liquify any gas at a low enough temperature but freezing and solidifying are another issue entirely, nitrogon, helium. hydrogen and oxygen and i believe (but im not sure) ALL of the noble gases have no freezing point under normal earth atmospheric pressure as that point is below 0 kelvin, which is the coldest possible temperature because something cools down by losing energy but at 0 kelvin AKA absolute zero, a substance has no energy left to lose. just as a photon can lose mass because they have no mass to begin with, you cant lose what you dont have.
Just Multiply true. CO2 for example. actually i just realized, you always hear about frozen CO2 but you never really hear anything about liquid or frozen CO (carbon monoxide). hmm im gonna have to look that up now.
Pardon my ignorance, but how could you "accidentally" make liquid oxygen? Oxygen has a boiling point of -183 degrees Celsius, what reactions could you possibly doing to get something that cold by accident? Also I would then like to know how you could prevent such a thing from happening. Thanks.
+Stuart Smith I'd say it's a problem when you want to extract a certain gas from the air by cooling air down. The different gases all turn to liquid at different temperatures.
+Stuart Smith I'd say it's a problem when you want to extract a certain gas from the air by cooling air down. The different gases all turn to liquid at different temperatures.
+za909returns Sometimes you need to run a reaction or keep a reaction product at very low temperatures. If it requires sufficiently low temperatures a cold trap with liquid nitrogen as your source of cooling can be used. If you accidentally open the trap some atmospheric oxygen can get in. Liquid nitrogen has a lower temperature than liquid oxygen, so some oxygen can condense. He said it is a big fear because the components that are attempting to be isolated are likely organic in nature and make for potentially vary reactive species when combined with liquid oxygen.
Since I had a lung engineer switch me over from bromine to oxygen I've felt so much calmer, at ease with myself, and ready to grasp the opportunity of each new day 😌🧘🏞️
Her's what I found to be the best answer: Ozone has a short half-life, 7-20 minutes because it's so reactive. Therefore, it stays where it is created, in the upper atmosphere. Great question and it was fun finding the answer!
Love your vids ***** Just one tip : When doing highly reactive experiments ... it's better to show them against a black (or very dark) background. The O2 reaction was barely visible against that white wall ^^ Eventually that little wall will turn black by itself, though.
These videos really need prominent mention of the atomic number in the thumbnail and in the title, so it's less of a chore to watch them in order besides using the playlist.
If he had been my professor for chemistry, I would have paid close attention. What is it about sitting in an auditorium that causes people to go into coughing fits??
What I mean by this is that red, orange, yellow, green, blue, and violet all get scattered across the sky by Rayleigh scattering. If you were to put all of these wavelengths of light on a graph then you would see the violet on the high end of the scattering and red on the low end. Draw a line from the top of the red across to the violet end and this will show that all of the colors blend to make white light plus whatever's above the line.
Hello there, I have a few simple questions: Is the same type of oxygen you get from electrolisis with water and the oxygen tanks that dives use to breath below water? If yes, can you tell me if it's safe to breathe only the pure oxygen bubbles generated from electrolisis-water? The oxygen in gas texture and using distilled water.
Vagner Pereira reading your comment prompted a dj session of me pressing different keys to make what some might call "music" seven is my favorite personally
Is it possible to visualize directly the absorption of UV light by ozone? For example: if you shine a UV light toward a transparent container full of ozone and you have a phosphorescent screen after the light and the ozone, will the screen emit less light where the UV rays are absorbed by the ozone?
Ive done it. Lab vacuum systems use a liquid trap so that evaporated solvent is captured before it goes into the vac pump. The trap is a long glass chamber set up in between the vac line opening & the pump. Liquid N2 is kept in another container around the glass chamber. This chamber can be removed to rid of collected solv. If the chamber isnt attached right it leaves room for O2 to get in. When the pump is turned on it sucks O2 in & cools to the point it becomes a liquid. Hope that made sense
I've got two questions and please, don't flame, I'm just curious. One, exactly how cold is liquid oxygen? And two, if the temperature of liquid oxygen was manageable let's say to direct contact with skin, would it be feasible, or should I say possible theoretically to breathe the liquid form of oxygen if we were say submerged in it or something. Like I said, don't flame, these are just purely hypothetical questions from curiosity. Thanks.
que inveja desses alunos....aulas assim fazem muito a diferença....por isso eles sao de primeiro mundo...professores bem pagos...aulas super bm dadas....
@Jaskarsis- A molecule of Oxygen is still an element. The words atom and element are not 100% interchangeable, though each element has it's own type of atom.
correct me if im wrong, but if you're asking how to make liquid oxygen, all you have to do is cool it below its bloiling point. The energy you put in forms the dipole interactions with the other O2 atoms and enters into its liquid state.
Use the principles of RGB and you may see that the colors above the line blend to give mainly a blue color. Mix the blue above with the white below and what do you get? Light or sky blue! So that's the way I see it at least although I can't be sure. Look up the RGB on the color sky blue and you'll see what I mean; some red, more green, and lots of blue, which fits the theory perfectly.
Yes, as white light enters the atmoshere, blue wavelengths are largely reflected and scattered by oxygen molecules. That is why liquid oxygen appears pale blue. It is reflecting blue light.
Thanks for the wonderful video. I have a doubt here. Ozone has three oxygen atoms and thus it is denser than oxygen molecule. So, ozone has to be near the earth surface rather than in stratosphere, right?
The symbols of Stravinskium and Holsium are:Sk and Hl Stravinskium is a element named after Igor Stravinsky. Holsium is another element named after Gustav Holst
+Robert Lawton Interesting point, but as it turns out your description perfectly fits within the definition of an experiment. ex·per·i·ment noun 1. a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
I want to go to the University of Nottingham and listen to Professor Poliakoff so hard but I think it could get hard for me to have that dream fulfilled since I'm from Hamburg and still have 2 years of school to go. But my own research I do at home is already worth a lot for me since I really discovered things through that myself others just learn through reading a lame book or so. Also I'm quite lucky to know someone smart who has real fun listening to what I do and validate or correct my discoveries and explanations so I know I'm not getting off track with my thoughts.
Some of the Bell X-1's (the first planes to break the sound barrier) exploded from liquid oxygen saturating various gaskets, which would then violently combust if jarred strongly enough.
Ozone is formed in the atmosphere when free oxygen atoms react with O₂. The free oxygen atoms in turn are created in two ways. 1) O₂ + UV light → O + O 2) O₃ + UV light → O₂ + O However, reaction 1 is much slower than reaction 2, because ozone is much more reactive than molecular oxygen. So, reaction 2 is the principal mechanism of UV absorption. Since free oxygen atoms will react quickly with O₂, the level of ozone will stay about the same unless something else like Freon reacts with the atoms
Only 2 forms? What about the octaoxygen allotrope formed at extreme pressures as it transitions into the solid phase? It can also exist as an oxygen radical on it's own or as O4 transiently.
" If it wasnt for the ozone in the upper atmosphere all of us would be if not dead ;certainly very much less confterable than we are at the moment." That made me crack up when he said it with his facial expresion 4:50
If you were to put liquid oxygen in a glass tube and then wrap some copper wire around the glass tube and apply an electric current, would you get and electromagnet as you would using an iron or steel core?
For the same reason that the sky is not blue at sunset. Violet doesn't travel very far downwards because of how small the wavelength is (like you said it scatters more at higher elevations so less of it hits your eyes). In fact violet has the smallest wavelength of any visible light.
the color from the scattering is also due to the composition of what is scattering it. in the early years of earth, when there was little oxygen and more sulfur, scientists hypothesize that the sky was green
Having already used and played with liquid nitrogen and liquid air, including dipping my finger in it, I can tell you you have to do it really fast, as the leidenfrost effect only last for a very short amount of time (less than a second or so). So drinking liquid oxygen would most certainly get you severe frostburns.
Color is a visual perceptual property, you are right. What colors physically represent (light at diffrent wavelenght) and they way they are mentally perceived (interpreted by the brain/mind) are two diffrent things. They are both important, that is a fact. My last reply didn't meant it ONLY has to do with optics. It's just that I might have missinterpreted your last statement. Cheers.
The paramagnetic property of oxygen is how we can calculate its partial pressure in anaesthetic circuits to determine the inspired (and expired) oxygen %
Liquid nitrogen has a lower boiling point than liquid oxygen does. If an uninsulated container is used to store liquid nitrogen, liquid oxygen can bead up on the outside and cause problems. Liquid nitrogen is generally used in a still-type device in place of ice water and pure oxygen is pumped through the tubing instead of gaseous ethanol to make liquid oxygen.
Is Neil a robot that they built for dangerous chemistry experiments or something? He's always so stern and quiet.
"The Chemical Stig" he's referred to as.
+John “MrXhojn” Hughes He's a working joe
+Zivilyn The Wyrd lol nice
Neil II the Stern
He's a synth
3:50 "Oops" is the last thing you want a chemist to say when he demonstrates liquid oxygen properties.
Reminds me of that walter lewin's experiment.
Second last, the last thing is glass smashing.
True.
I feel like this episode really didn’t do Oxygen justice, the fact that the video on Yttrium is almost 2x longer sort of shows this. I would love a revisiting of such an important element.
In a bit more depth, oxygen doesn't have the energy to directly combine with carbon, so that's why you don't get trees that spontaneously combust. Rather, a heat source (the smouldering splint here) provides the activation energy for the carbon to split and combine with oxygen, that in itself is exothermic, which then supplies more heat generating a chain reaction that can boil gases off which then burn in atmospheric oxygen (the flame). In the atmosphere, the nitrogen gets in the way of the oxygen which means that glowing splints cannot reach the temperature to boil off gases in the wood fast enough to re-ignite - there is simply a too low concentration of both gases and oxygen. However in the gas jar, there is so much oxygen that re-ignition is inevitable - and since more oxygen means a higher flame temperature, the gases can ignite.
Nice explanation, it has been six years. What are you doing now?
4:10
These guys have way to much fun making these videos. I wish I could join them in their videos.
Did he open with "comrads"? Thats the best thing ever
Got to spread the Party's manifesto
+red toasti his parents are actualy russian immigrants.... he probably got it from his dad lol
primus loy I dont think thats the reason
red toasti his dad worked under the Soviet Union
AAJAA5 you say half Glass full, I say half glass empty.... Each have their own opinions... Don't force yours on to others.... Sir professor here is an immigrant too.... Doesn't mean he is bad...
that guy looks like science
i approve!
the science whisperer!
+Keenan Geenachternaam He IS science!
+Keenan He really, really does
+Keenan The neil guy looks like Breaking Bad.
They laughed at "careful at my shoes" and not at the test tube one ? lol!
Is it possible to make liquid ozone?
yes
Ofc
Daniel Thu how
It's the same thing as liquid oxygen... think what LIQUID particles are arranged like.
According to Wikipedia, it's a deep blue liquid
I absolutely love the Professors hair. he certainly looks like an extreme scientist.
The guy in black T-shirt looks like a hitman ;__;
Jason Patowsky Most intimidating chemist ever
Because he is Neil.
Jason Patowsky More like Walter White :D
No the professor is a hitman. Look at his suit and glasses
***** im everywhere :D
Doesn't nitrogen have lone electron pairs as well?
yes they do, but how does that corelate to a video about oxygen?
note blocer
@@greengreen110 8 year old comment but if nitrogen has unpaired electrons, it should behave like oxygen and yet its not reactive nor magnetic
why tf are you commenting on this
Hey! Didn’t expect to find you here! Also the answer is yes.
"Oxygen, strongly oxidizing"
Well... yeah.
By saying that he meant that oxygen prone to catching electrons from another chemical.
Mmmyes…
…The floor is made of floor
Ah yes, the oxygen here is made of oxygen.
I love these clips! Chemistry was my favorite subject when i still attended school. Wish i had studied it. I’m 63 now and am considering to pick it up again!
It’s never too late.
Trying to come up with pun #8 on my quest to (badly) pun every element
O... I got it.
I would take this class if that Science Guy would teach it
Nice Green Day picture
He is a professor
"professor Sir Martyn Poliakoff CBE CChem FRS FREng FRSC FIChemE"
he has a knighthood.
I found the video entertaining, informative and I liked it from a production perspective. Nice interplay between the two men.
nice empty front rows of the lecture hall
linkviii reminds me of how we sit in a class during college..
+linkviii Back rows must have a lower energy state or something like that.
+linkviii Maybe they needed to clear the way for the video shoot.
+linkviii If my professor was messing around with liquid oxygen, I might sit in the back too.
+linkviii Is it because this 'degree course' seems to cover stuff I learnt before I was 10?
Did anyone else crack-up when the test tube came floating down on a piece of string?
I love that little fluffy grey dog that sits on his head. All in all, these guys are chemistry Gods.
Chemistry seems still to retain a certain Dr Frankenstein like enthusiasm for stuff reacting violently.
Oxygen is the second-most reactive non-metal, having reactivity almost typical of a halogen. Only because we are finely tuned for using it in respiration is it at all safe, and then only when it is about one-fifth of the atmosphere.
Liquid oxygen and ozone are both very dangerous substances due to their reactivity.
Can you liquefy ozone? If so, how would it behave?
cool idea i never thought of that :)
just looked it up and you can and its a very powerful cleaning agent.
Chaplain Dave Sparks You can liquify almost anything at low enough temperatures.
Breanna Thompson you can liquify any gas at a low enough temperature but freezing and solidifying are another issue entirely, nitrogon, helium. hydrogen and oxygen and i believe (but im not sure) ALL of the noble gases have no freezing point under normal earth atmospheric pressure as that point is below 0 kelvin, which is the coldest possible temperature because something cools down by losing energy but at 0 kelvin AKA absolute zero, a substance has no energy left to lose. just as a photon can lose mass because they have no mass to begin with, you cant lose what you dont have.
Just Multiply true. CO2 for example. actually i just realized, you always hear about frozen CO2 but you never really hear anything about liquid or frozen CO (carbon monoxide). hmm im gonna have to look that up now.
can we take a moment to discuss that profs hair?
he looks like science lol
I_Like_Pokemon He is the epicenter of science. Experiments done worldwide are actually aftershocks as a result of his thoughts reacting in his hair.
"River, he's putting the hair away."
"It doesn't matter. It'll still be there. Waiting."
I think that The Professor indeed may have had some sort of accident involving either a Tesla Coil , Lightning, or a Van De Graaff Generator .
Pardon my ignorance, but how could you "accidentally" make liquid oxygen? Oxygen has a boiling point of -183 degrees Celsius, what reactions could you possibly doing to get something that cold by accident? Also I would then like to know how you could prevent such a thing from happening. Thanks.
+Stuart Smith I'd say it's a problem when you want to extract a certain gas from the air by cooling air down. The different gases all turn to liquid at different temperatures.
+Stuart Smith I'd say it's a problem when you want to extract a certain gas from the air by cooling air down. The different gases all turn to liquid at different temperatures.
+za909returns Sometimes you need to run a reaction or keep a reaction product at very low temperatures. If it requires sufficiently low temperatures a cold trap with liquid nitrogen as your source of cooling can be used. If you accidentally open the trap some atmospheric oxygen can get in. Liquid nitrogen has a lower temperature than liquid oxygen, so some oxygen can condense. He said it is a big fear because the components that are attempting to be isolated are likely organic in nature and make for potentially vary reactive species when combined with liquid oxygen.
"we have the fuel, we have our oxygen"
by the gods, thank you for not calling an oxidizer a fuel XD
learning a lot from this guy, i wished he was my science teacher
+Ni9kye If you are learning from him then he is your teacher.
Your not wrong
Duncan Coulter
Your quite right, he is my teacher. Im saying my old ones made science very dull... Chemistry/Science is anything but dull.
i love breathing this element in , best ever
Since I had a lung engineer switch me over from bromine to oxygen I've felt so much calmer, at ease with myself, and ready to grasp the opportunity of each new day 😌🧘🏞️
Her's what I found to be the best answer: Ozone has a short half-life, 7-20 minutes because it's so reactive. Therefore, it stays where it is created, in the upper atmosphere. Great question and it was fun finding the answer!
"This is the same stuff we use to take make-up off... uhh off our wives."
As soon as he said that I couldn't help but picture him in full drag.
Love your vids *****
Just one tip : When doing highly reactive experiments ... it's better to show them against a black (or very dark) background. The O2 reaction was barely visible against that white wall ^^
Eventually that little wall will turn black by itself, though.
Neil always just stands there....
He's the chemical stig
Zach Huesgen Can I like your comment some more? XD
These videos really need prominent mention of the atomic number in the thumbnail and in the title, so it's less of a chore to watch them in order besides using the playlist.
You should let every person have and finish his part and not cut in-between conversations.
If he had been my professor for chemistry, I would have paid close attention.
What is it about sitting in an auditorium that causes people to go into coughing fits??
"Lets start with an experiment I already tried this one with my hair this morning"
I love these videos. This one could do with a bit of de-interlacing though.
Sometimes I think these people just went for this job to blow up things ...
What I mean by this is that red, orange, yellow, green, blue, and violet all get scattered across the sky by Rayleigh scattering. If you were to put all of these wavelengths of light on a graph then you would see the violet on the high end of the scattering and red on the low end. Draw a line from the top of the red across to the violet end and this will show that all of the colors blend to make white light plus whatever's above the line.
Is it just me who thinks that Neil (guy in black shirt) is really badass?
Hello there, I have a few simple questions:
Is the same type of oxygen you get from electrolisis with water and the oxygen tanks that dives use to breath below water?
If yes, can you tell me if it's safe to breathe only the pure oxygen bubbles generated from electrolisis-water?
The oxygen in gas texture and using distilled water.
If you press 4 while watching..LIQUID NITROGEN
If you continuously press you'll hear something strange
thank you so much
Vagner Pereira reading your comment prompted a dj session of me pressing different keys to make what some might call "music" seven is my favorite personally
Zoe Nepsa 2.. Thriller lol
If you press 2 you can hear Oxygen.
This guy is amazing. Great job at demistifying CHEMISTRY. Do not let this video project die. This is making a world impact.
this is the same thing we use to wipe off makeup and baby's bums
hahahahahaha
Is it possible to visualize directly the absorption of UV light by ozone? For example: if you shine a UV light toward a transparent container full of ozone and you have a phosphorescent screen after the light and the ozone, will the screen emit less light where the UV rays are absorbed by the ozone?
Is Neil Ilin Pain?
Ive done it. Lab vacuum systems use a liquid trap so that evaporated solvent is captured before it goes into the vac pump. The trap is a long glass chamber set up in between the vac line opening & the pump. Liquid N2 is kept in another container around the glass chamber. This chamber can be removed to rid of collected solv. If the chamber isnt attached right it leaves room for O2 to get in. When the pump is turned on it sucks O2 in & cools to the point it becomes a liquid. Hope that made sense
"There she blows"
I remember this being the first one I watched. I love this channel.
the bald guy is awesome
You look, and sound like a mad scientist, really like your stuff.
Why cotton wool? You should have poured that LOX onto a bagel.
+NetRolller3D *GROAN*
I've got two questions and please, don't flame, I'm just curious. One, exactly how cold is liquid oxygen? And two, if the temperature of liquid oxygen was manageable let's say to direct contact with skin, would it be feasible, or should I say possible theoretically to breathe the liquid form of oxygen if we were say submerged in it or something. Like I said, don't flame, these are just purely hypothetical questions from curiosity. Thanks.
Does Neil remind anyone else of Walter White
Not really... Am I normal 8- |
blueracer66 haha soo true, never talks, is used like a tool.... LOL
+Captain Falcon White W. White/S. L. Jackson mix
no
que inveja desses alunos....aulas assim fazem muito a diferença....por isso eles sao de primeiro mundo...professores bem pagos...aulas super bm dadas....
in pure oxygen, every mixtape is fire
This video has excellent editing, very riveting, good work to whoever edited this.
WAYYY too many cuts in the video..
its 8 years old
Cyrus Bond Omg it is.
thahitcrew modz you could say it's an...... emo video
so are there any uses of this 1 atom alone, or is it dangerous or unstable?
You must put some liqid Oxigen in the hair of The Professor and light it
Flame again, Let's boom
He'd go super saiyan!
nooooooo, not the hair!
Lets BOOM or may be his shoes
@Jaskarsis- A molecule of Oxygen is still an element. The words atom and element are not 100% interchangeable, though each element has it's own type of atom.
make liquid ozone.....i'm going to guess it should be dark blue or violet.
and highly poisonous...
don't stress the small details...
African Electron "small" details.....
***** yea, its not like it'll kill you or anything. "Hey Mum COME HERE!"
Why do you guess that color?
correct me if im wrong, but if you're asking how to make liquid oxygen, all you have to do is cool it below its bloiling point. The energy you put in forms the dipole interactions with the other O2 atoms and enters into its liquid state.
Who takes there partners makeup of?
That's what I was sayin
lol wow
Scientists are weird
Use the principles of RGB and you may see that the colors above the line blend to give mainly a blue color. Mix the blue above with the white below and what do you get? Light or sky blue! So that's the way I see it at least although I can't be sure. Look up the RGB on the color sky blue and you'll see what I mean; some red, more green, and lots of blue, which fits the theory perfectly.
Is that why the sky is blue?
yes
no
Yes, as white light enters the atmoshere, blue wavelengths are largely reflected and scattered by oxygen molecules. That is why liquid oxygen appears pale blue. It is reflecting blue light.
wasrnt air mostly nitrogen?
+Belgian Waffles666 Liquid nitrogen is clear. It has no effect.
Thanks for the wonderful video. I have a doubt here. Ozone has three oxygen atoms and thus it is denser than oxygen molecule. So, ozone has to be near the earth surface rather than in stratosphere, right?
"Comrades?" Ok...
Scary...
The symbols of Stravinskium and Holsium are:Sk and Hl
Stravinskium is a element named after Igor Stravinsky.
Holsium is another element named after Gustav Holst
how come when he stuck the tinder in the tube of Oxygen it didnt ignite?
Not enough fuel i think
I know I like to start the day with a nice big travel mug of liquid oxygen.
can we drown in it?
No. You'd freeze solid before drowning became an issue.
pete has a certain enthousiasm that i really love about this channel
5 bucks says green jacket science man likes to try on his wife's dresses from time to time
Tom Goldberg mad my day.
Anon Ymus *made
Anon Ymus *Google+ has an edit feature now!
...for about the last year or so.
Five bucks says you're projecting, and that you're a scrote.
It's not an "experiment". It's a demonstration that illustrates a point.
+Robert Lawton Interesting point, but as it turns out your description perfectly fits within the definition of an experiment.
ex·per·i·ment
noun
1. a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
"there she blows"
I think oxygen lowers the flash point of other materials, the temperature needed to start burning.
I want to go to the University of Nottingham and listen to Professor Poliakoff so hard but I think it could get hard for me to have that dream fulfilled since I'm from Hamburg and still have 2 years of school to go.
But my own research I do at home is already worth a lot for me since I really discovered things through that myself others just learn through reading a lame book or so. Also I'm quite lucky to know someone smart who has real fun listening to what I do and validate or correct my discoveries and explanations so I know I'm not getting off track with my thoughts.
hamburg the best city in the world moin moin
Some of the Bell X-1's (the first planes to break the sound barrier) exploded from liquid oxygen saturating various gaskets, which would then violently combust if jarred strongly enough.
2:18
Hah!
It's like the _"mad scientist and his huge scary shop assistant that doesn't"_ talk routine.
in a parallel universe, the thumbnail is a zero and professor teaches us about neutronium
i really admire teachers or professors who make students love thier subject
@Versudan This is a university though, not a school.
Ozone is formed in the atmosphere when free oxygen atoms react with O₂. The free oxygen atoms in turn are created in two ways.
1) O₂ + UV light → O + O
2) O₃ + UV light → O₂ + O
However, reaction 1 is much slower than reaction 2, because ozone is much more reactive than molecular oxygen. So, reaction 2 is the principal mechanism of UV absorption. Since free oxygen atoms will react quickly with O₂, the level of ozone will stay about the same unless something else like Freon reacts with the atoms
Only 2 forms? What about the octaoxygen allotrope formed at extreme pressures as it transitions into the solid phase? It can also exist as an oxygen radical on it's own or as O4 transiently.
Id like to see O8 (Red Oxygen) some time.
Apparently you can only make it in very high pressure. Would be cool though.
so happy I chose chemistry higher for my IB course. I'm happy that I get to understand this videos
The other day I dreamt that my dad invited Professor Poliakoff over for dinner.
These videos are brilliant!
" If it wasnt for the ozone in the upper atmosphere all of us would be if not dead ;certainly very much less confterable than we are at the moment." That made me crack up when he said it with his facial expresion 4:50
If you were to put liquid oxygen in a glass tube and then wrap some copper wire around the glass tube and apply an electric current, would you get and electromagnet as you would using an iron or steel core?
Is there a specific reason or the tray to be of tin?
For the same reason that the sky is not blue at sunset. Violet doesn't travel very far downwards because of how small the wavelength is (like you said it scatters more at higher elevations so less of it hits your eyes). In fact violet has the smallest wavelength of any visible light.
the color from the scattering is also due to the composition of what is scattering it. in the early years of earth, when there was little oxygen and more sulfur, scientists hypothesize that the sky was green
That's a good question, I am going to try and find the answer to that right now, and I'm 26 years old! Great thinking bud!
Having already used and played with liquid nitrogen and liquid air, including dipping my finger in it, I can tell you you have to do it really fast, as the leidenfrost effect only last for a very short amount of time (less than a second or so). So drinking liquid oxygen would most certainly get you severe frostburns.
Color is a visual perceptual property, you are right. What colors physically represent (light at diffrent wavelenght) and they way they are mentally perceived (interpreted by the brain/mind) are two diffrent things. They are both important, that is a fact. My last reply didn't meant it ONLY has to do with optics. It's just that I might have missinterpreted your last statement. Cheers.
Would have loved to have had these guys as chemistry teachers in school
The paramagnetic property of oxygen is how we can calculate its partial pressure in anaesthetic circuits to determine the inspired (and expired) oxygen %
Liquid nitrogen has a lower boiling point than liquid oxygen does. If an uninsulated container is used to store liquid nitrogen, liquid oxygen can bead up on the outside and cause problems. Liquid nitrogen is generally used in a still-type device in place of ice water and pure oxygen is pumped through the tubing instead of gaseous ethanol to make liquid oxygen.
Is there any difference between O and O2 ?
"So here we have a match on a stick"
always a good way to start an experiment