We're on Bondi Beach to discuss the ozone layer - a topic of great interest to Australians. More chemistry at www.periodicvideos.com/ Follow us on Facebook at / periodicvideos And on Twitter at / periodicvideos
Up until now I was on the fence (yet leaning at least) about the anthropogenic nature of global warming but this puts all that nonsense to bed for me. Thank you Prof for another simple explanation of a complex problem.
I have no idea how i stumbled on to this video, and i'm not a smart person, but this intelliegent young man made me find science very interesting. I admire you.
Excellent and informative video! The atmosphere is so important and it should be top priority. On a side note, I had a chuckle when the professor lost his words when the girls in bikini walked by. It could be just a coincidence though haha.
I had never put much thought into the mechanism that's causing the depletion of the ozone layer. To be honest before clicking on this video I would of said ozone was an element and not a combination of 3 oxygen atoms. In just over 8 minutes the Professor has clearly and concisely explained the process in a way I can visualise it happening. Thank you for these channels and the time and effort you and your colleagues give to promote thought and understanding of this amazing world we live in.
This explanation of O3 is very well done. I (like many others) gravitate towards visual references while learning...Thank you Periodic Videos! Any chance at a video made on Hypothetical compounds? Cyclic ozone, hexaphenylethane and above all Bromochlorofluoroiodomethane. Again, Thank you all for the amazing videos.
What makes the chlorine ions go inactive? It seems more like a catalyst than a exhaustible reactant. Does it bind with some other molecule to become inert to O3?
I was expecting to be a little more distracted with a whole video filmed on the beach :) Nice to have a more in-depth explanation of the chemistry of ozone depletion.
Good video! I really like your way of presenting things! When you mentioned the color of ozone, a question i've been wondering for a long time came to mind: Why is the sky blue? Do you know (or anybody reading this)? Is it only ozone or do other gases contribute? Cheers!
The argument as to why the hole is more pronounced over the Antarctic rather than the Arctic is due largely because the temperatures over the Arctic in the lower stratosphere are higher. This is because the upper atmospheric circulation is faster in the northern winter/spring. This is because the northern topography generates more gravity waves than the southern counterpart. The polar vortex is also more stable in the south. Together this means the temperatures are lower. (part 1 of 2)
so ozone is more reactive than a normal oxygenmolecule, what would it then look like if you put a glowing piece of wood into pure ozone, because in pure oxygen it allready burns really bright
I'm alittle confused. How can a molecule like cfc even make it up to that point in the atmosphere to react with the O3? I mean carbon bonded with fluorine should make it heavier then just O3 shouldn't it?
@jmanders1 hi - i dont have enough time or space to explain properly. Im pretty sure sixtysymbols has a vid on this. Its to do with the wavelength of blue light in relation to the size of an oxygen molecule, and how it is scattered, or should i say the fact that its scattered. the sixtysymbols vid also explains nicely why sunsets appear red/orange/yellow :)
@Ricalloo Many sources produce O3 and one of them is high voltages creating coronas and sparks. Most photocopiers have "corona wires" that apply a charge to the paper so the ink will cling to it and this is what make ozone in your xerox machine.
*--insert Spongebob push Bikini Bottom somewhere else joke here--* Now that the nonsense has been taken care of, i would like to state that the demonstration here was well done.
The chemistry that destroys ozone requires maintenance of the polar stratospheric clouds into springtime. The temperatures required are those below about 195 K at which nitric acid trihydrate crystals are thermodynamically stable.(part 2 of 2)
@sikaisvirins Weather patterns can also have a factor. Most industrial cities exist in the sub-tropical temporate zones. The pressure gradient tends to push air from the tropics northward until it collides with the polar front. This traps the colder air above 60 degrees of latitude. The mixing of the air at the polar front is poor, so the hole persists becasue ozone from the tropics is not able to replace it. Just a partial explination.
@TheReaverOfDarkness If I recall this correctly (it's been a while since I learned this in school) the problem was this: O² + O -> O³ and O³ + UV -> O² + O is what happens normaly. Now here comes our bad element X: X + O³ -> XO + O² and XO + O -> X + O². So essentially what now happens is this: O² + O -> O³ and O³ + O -> O² + O². First of all the Ozon is of no use if it doesn't use the harmful UV and second you take all the O and create O² from it but you need O to form O³.
Would it be possible for periodicvideos to SHOW us liquid ozone. I mean, I know it's explosive on being allowed to boil an all, but it's just something I've always wanted to actually SEE. There doesn't seem to be any existing video, or any good images of it in existence of it anywhere, and it would provide fantastic demonstration of the quantum mechanical three body problem that gives rise to the color of liquid oxygen and ozone.
@TheReaverOfDarkness eventually, yes... this is why the holes eventually (after a very long time) repair themselves... but bear in mind the ozone layer is fairly substantial and took a long time to form, you can see how a sudden loss of O3 causes a hole.
