What can also be seen in the part with the carbon rod but you forgot to notice is that the rod appears hotter than the flame. That's because the camera does not actually report temperature but level of infrared radiation. Different materials radiate differently and so carbon rod appears brighter even though it cannot possibly be hotter than the flame.
This is why micro filaments of materials with known radiative properties are used to collect flame temperature data in practice. The filaments glow and the camera is focused on the filaments.
Assuming that there are small holes drilled between the inside of the main flame tube and the gap in the top ring, it is a 'flame holder'. The holes allow a small amount of the fast moving gas to flow into gap and create a small 'ring' of flame around the tip, acting as a pilot light for the much faster moving flow. This makes the burner much less sensitive to gas pressure and makes the chance of the flame being blown out by giving a spot where the speed of combustion is always slower than the speed of the flow.
Dear Sir Martin Poliakoff, Your videos simply made me fall in love with chemistry. Ever since I discovered your channel, I can't stop myself watching your videos every day! Thank you so, so much! You are really very precious. I wonder if you can make a video about Methylphenidate? It's a central nervous system stimulant and also the most popular compound used to treat Attention Deficit Disorder in all over the world. Regards.
You know what the best part of this video is? It is that the host, who is however-many years old, is telling us that he's learning new stuff that conflicts with what he'd always been taught. We should not take that for granted. Outside of the "STEM disciplines this rarely if ever happens. In movies, it nearly always gets distorted into some weird thing.
I wish i took chemistry at school, as i have got older i have got real interested in this subject and are now looking at courses on the O. U. Your chanel is a real inspiration Thank You
Could you maybe try to take a very conductive metal like copper or silver in the flame, and see how the heat "moves" along it with the thermal imaging camera, and compare it?
My favorite bunsen burner faux pas was an experiment involving ether in my freshman class. The teaching assistant failed to tell us we were meant to heat the flask of ether in a water bath, not directly on the burner. I was first on the mark with heating and soon both myself and the entire class watched in amazement as my setup exploded, flew through the air, hurting no one, and flames burned on my bare arms. Also didn't hurt, being ether, but we didn't know that yet. We learned a lot about ether that day and the teaching assistant begged us not to tell the professor. :D We didn't because we thought it was all great fun in the end.
4:01 The professor mentions 'our videos on glass blowing', but I can't find videos on glass blowing on this channel (or Sixty Symbols or Nothinghamscience). Am I missing something or is this a reference to a future video. A link would be appreciated in case I missed it.
Just got the UA-cam notification email to say Periodic Videos are doing Bunsen Burners - for me that means an instant click on the link to watch it and everything else can wait.
I still remember the adjusting the vent part. Also on the FIRST DAY of class the teacher pulled the hose off and a giant tongue of flame shot across the bench. He only did it to show what you had to do to turn it off and not panic.
The gap between the 2 layers of metal, is to keep the burner on when it is on " air intake " mode. If it is not there the stream of O2 and CH4 will blow the flame out. If you hold you finger in the output the gas will come out of the gap.
Some say that he once punched a methane gas cylinder through the ground. And that an inanimate carbon rod is his only friend in the entire world. All we know is, he's called Neil.
I think the double tubing at the end of the burner functions as a flame keeper. Many burners don't have that feature but it allows a larger flame without it blowing off the burner. So it is a sort of safety feature. But it is not particularly effective at preventing burnt fingers!
If the fuel and air are already mixed at the bottom, why doesn't the flame start from there? Is it because contact with the metal surface keeps the gas temperature below the ignition point?
Great video. I never thought I would find a Bunsen burner interesting. I would like it if you would do the same footage but with the professors from 60 symbols doing there take.
I was hoping to get an explanation to why the flame stays on top and does not go down the burner when the little windows are open. Is it because there's not enough oxygen? Or because the velocity of the mixed gas in the burner is too high? What would it take to have the flame go up the stream? I once made hydrogen but stopped because I was scared the impurities in the gas would make the flame go upstream though the hose and make a pressurized tank go boom...
Could you please make a Video about how chemits discover the shape of a molecule. I'm really intrested in this topic but I dont know how they discover it and it would be so nice if you do a video about it.
Always beens curious why the combustion doesn't continue further toward the fuel source. How is the reaction contained? I suspect the lack of oxygen is involved but the details are a mystery to me.
Don't forget, carbon is a versatile element that exists in a myriad of forms. This is the element that brings us materials ranging from graphite to diamonds. While I can't pretend to know much regarding the specific material properties of carbon-based materials, it really wouldn't surprise me if there's a variety or two out there that are simply quite resistant to heat. Surface area might play a part, but my hunch is that the atomic bonds are just as important
Yes we use Methane always for Bunsen burners. You can use Liquefied Petroleum Gases in them, however I think due to the large reserves of Natural Gas (which is primarily Methane) found off the coast of the UK, it makes it cheaper to use Methane in the UK.
I love your vídeos and chemestry, I am on 9th grade and it is the first year I have Chemestry on my school, could you do a tips and tricks on learning Chemestry video please. Thank You!
expected to see something about a noisy flame and a silent flame.. if I remember my chemistry lessons where I had to do stuff myself.. that has been a few years now
You can, it's just that methane is common and cheap these days. It used to be the case that gas supplied to homes was a mixture of hydrogen and carbon monoxide, made by blasting heated coal with steam, but methods of extracting natural gas (which is mostly methane) got more effective, so it ended up taking over the role.
if you think of it that's the part that's in contact with "cold" air so the transference of energy between that air and the reaction of the flame makes that part get cold faster than the tip of the blue cone
Austin Nguyen - when gas flow exceeds a certain velocity it changes from laminar flow to turbulent flow. I suspect that air currents are also a contributing factor with the flame.
whuzzzup You need to look up the meaning of the word smug. If you don't own a dictionary (and I'm prepared to bet money that you do not) there are plenty on the web.
I realy like the vids but pls not evry Video with thermal imaging or at least not as the main point off the Video i doenst mean that those Videos are bad they are really nice but a little bit change would be nice :)
Could you please make a Video about how chemits discover the shape of a molecule. I'm really intrested in this topic but I dont know how they discover it and it would be so nice if you do a video about it.
This man looks like science.
he is prof. Martyn Poliakoff... a great research scientist.....
Daniel Costache This man *is* science!
he's also a knight
lol
Though he doesn't look like one...
What can also be seen in the part with the carbon rod but you forgot to notice is that the rod appears hotter than the flame. That's because the camera does not actually report temperature but level of infrared radiation. Different materials radiate differently and so carbon rod appears brighter even though it cannot possibly be hotter than the flame.
That is interesting. Thank you.
This is why micro filaments of materials with known radiative properties are used to collect flame temperature data in practice. The filaments glow and the camera is focused on the filaments.
Assuming that there are small holes drilled between the inside of the main flame tube and the gap in the top ring, it is a 'flame holder'.
The holes allow a small amount of the fast moving gas to flow into gap and create a small 'ring' of flame around the tip, acting as a pilot light for the much faster moving flow.
This makes the burner much less sensitive to gas pressure and makes the chance of the flame being blown out by giving a spot where the speed of combustion is always slower than the speed of the flow.
Someone give that inanimate carbon rod an award.
Lloyd Evans In Rod We Trust
Will we get to see a close up of the rod?
Brig. Gen. Jack D. Ripper Ha, References.
Dio porco
Dear Sir Martin Poliakoff,
Your videos simply made me fall in love with chemistry. Ever since I discovered your channel, I can't stop myself watching your videos every day! Thank you so, so much! You are really very precious.
I wonder if you can make a video about Methylphenidate? It's a central nervous system stimulant and also the most popular compound used to treat Attention Deficit Disorder in all over the world.
Regards.
You know what the best part of this video is?
It is that the host, who is however-many years old, is telling us that he's learning new stuff that conflicts with what he'd always been taught.
We should not take that for granted. Outside of the "STEM disciplines this rarely if ever happens. In movies, it nearly always gets distorted into some weird thing.
Well it’s because science always gets things wrong. Whereas, other subjects the rules don’t change.
I wish i took chemistry at school, as i have got older i have got real interested in this subject and are now looking at courses on the O. U. Your chanel is a real inspiration Thank You
Could you maybe try to take a very conductive metal like copper or silver in the flame, and see how the heat "moves" along it with the thermal imaging camera, and compare it?
Also glass rod.
I was just searching some videos for glass blowing with Bunsen burner, and you posted a video today. what a coincidence.
My favorite bunsen burner faux pas was an experiment involving ether in my freshman class. The teaching assistant failed to tell us we were meant to heat the flask of ether in a water bath, not directly on the burner. I was first on the mark with heating and soon both myself and the entire class watched in amazement as my setup exploded, flew through the air, hurting no one, and flames burned on my bare arms. Also didn't hurt, being ether, but we didn't know that yet. We learned a lot about ether that day and the teaching assistant begged us not to tell the professor. :D We didn't because we thought it was all great fun in the end.
Excellent video!
4:01 The professor mentions 'our videos on glass blowing', but I can't find videos on glass blowing on this channel (or Sixty Symbols or Nothinghamscience). Am I missing something or is this a reference to a future video. A link would be appreciated in case I missed it.
Just got the UA-cam notification email to say Periodic Videos are doing Bunsen Burners - for me that means an instant click on the link to watch it and everything else can wait.
Love your videos- always interesting and sometimes quite humorous. Keep the Faith!
I still remember the adjusting the vent part. Also on the FIRST DAY of class the teacher pulled the hose off and a giant tongue of flame shot across the bench. He only did it to show what you had to do to turn it off and not panic.
This man is a hero.
The gap between the 2 layers of metal, is to keep the burner on when it is on " air intake " mode. If it is not there the stream of O2 and CH4 will blow the flame out. If you hold you finger in the output the gas will come out of the gap.
Can you's remake some of the old element vids (like silicon or selenium) in more detail? Thanks 😊
+Darren Campbell we will do this
Can you do explosions in Thermal Imaging?
Iconic! Great video
these videos are the best
Professor i am a really big fan of you thank you for all of the videos:)
very interesting! interesting story behind bunsen
Some say that he once punched a methane gas cylinder through the ground. And that an inanimate carbon rod is his only friend in the entire world. All we know is, he's called Neil.
TeslaMaster2 Some say he discovered all the known elements in one night.
I love you guys!
Perfect Happy new year to all the PTOV team
I think the double tubing at the end of the burner functions as a flame keeper. Many burners don't have that feature but it allows a larger flame without it blowing off the burner. So it is a sort of safety feature. But it is not particularly effective at preventing burnt fingers!
very well explained
with regard to the hottest part of the blue flame if you place a tripod and gauss above the flame does the hottest point still move around as much ??
Thanks again for another ace video, guys :)
If the fuel and air are already mixed at the bottom, why doesn't the flame start from there? Is it because contact with the metal surface keeps the gas temperature below the ignition point?
i would like to see really low temperature fire in the thermo-camera. it would be interesting to try different kind of achool and see the difference.
Would be interesting to see a video on the theories of element 137
Great video. I never thought I would find a Bunsen burner interesting. I would like it if you would do the same footage but with the professors from 60 symbols doing there take.
Love your stuff! Shout out to Brady!
this was really useful!!
Sadly the bunsen burner is just a relict nowadays, since all solvents used in modern synthesis are (highly) flammable.
I was hoping to get an explanation to why the flame stays on top and does not go down the burner when the little windows are open. Is it because there's not enough oxygen? Or because the velocity of the mixed gas in the burner is too high? What would it take to have the flame go up the stream? I once made hydrogen but stopped because I was scared the impurities in the gas would make the flame go upstream though the hose and make a pressurized tank go boom...
i think its because there's more oxygen on the air around the flame than inside the tube and fire tends to go to the place with more oxigen
Could you please make a Video about how chemits discover the shape of a molecule. I'm really intrested in this topic but I dont know how they discover it and it would be so nice if you do a video about it.
Always beens curious why the combustion doesn't continue further toward the fuel source. How is the reaction contained? I suspect the lack of oxygen is involved but the details are a mystery to me.
what kind of carbon did u use?
Question: Why doesn't the carbon rod burn? Not enough surface area?
Don't forget, carbon is a versatile element that exists in a myriad of forms. This is the element that brings us materials ranging from graphite to diamonds. While I can't pretend to know much regarding the specific material properties of carbon-based materials, it really wouldn't surprise me if there's a variety or two out there that are simply quite resistant to heat. Surface area might play a part, but my hunch is that the atomic bonds are just as important
is it normal in the UK to use Methane? in Germany we use primarily propane and sometimes butane..
Yes we use Methane always for Bunsen burners. You can use Liquefied Petroleum Gases in them, however I think due to the large reserves of Natural Gas (which is primarily Methane) found off the coast of the UK, it makes it cheaper to use Methane in the UK.
+Mink Liquefied Petroleum gases include propane and butane forgot to mention that!
I love your vídeos and chemestry, I am on 9th grade and it is the first year I have Chemestry on my school, could you do a tips and tricks on learning Chemestry video please. Thank You!
OLD-BIT ProGaming - I'm pretty sure Khan Academy already has chemistry videos that can help you.
BDB but it will be better here because it has scientists
the thermal image loooks like among us,lol.
btw thanks for teaching me and nice vid
What was the temperatur?
Can you do a video on pirahna solution (H2SO4/H2O2)??? would be pretty interesting
Daniel Lund - that stuff is used in the semiconductor industry to ensure that organics are cleaned off of the wafers.
How come the carbon rod doesn't catch fire? Or is the "carbon rod" not made of carbon at all? Am I missing something here?
GO CHECK OUT OBJECTIVITY!
the videos are terrific! have seen every single one and its always a pleasure
expected to see something about a noisy flame and a silent flame.. if I remember my chemistry lessons where I had to do stuff myself.. that has been a few years now
He did mention half of that. Yes, I'd prefer more information, rather than a thermal imaging video. It could be both....
I just can't help but stare at his magnificient hair :P
What is fire really?
now periodic videos are thermal imaging quite a few things like thunderf00t
Who?
kanedakrsa thunderf00t
wowfubar Who?
Is that an inanimate carbon rod?
How does this video even have one thumbs down, let alone several...
I thought that the double layer on the top was to minimise turbulence from upflowing air.
I'm very interested in Neil's rod
Science says love's a chemical reaction in the brain; so let me be your Bunsen burner, let me be your naked flame!
Good old Bunsen burner
Ricardo Bunsen Berna!!!!
Anyone?
Blue should be assigned for the hottest parts, and red for the cold parts... That's the reality.
Psychology though. Red bad. Don't touch red. (not applicable for cryogenics of course. Whatever)
They do it that way because stars are red and stuff and ice is blue.
stars are white
Surprised the carbon rod wasn't noticeably burned after that much time in the flame.
Why do they use methane, and not another fuel in the bunsen burner?
You can, it's just that methane is common and cheap these days. It used to be the case that gas supplied to homes was a mixture of hydrogen and carbon monoxide, made by blasting heated coal with steam, but methods of extracting natural gas (which is mostly methane) got more effective, so it ended up taking over the role.
Can you make a video about Diana's tree please ?
Chemistry-Related Stuff (THERMAL IMAGING) - Periodic Table of Videos
Peter Desaga was Bunsens lab asst.
I've never seen Neil talk in videos. Is he mute or is he simply a quiet person?
There was one video where they asked him a question but cut it before he could answer. So I'm guessing it's a version of 'The Stig'
Make a video on H2O3 aka hydrogen trioxide
If I remember correctly from my chemistry classes, I was told the hottest part are the sides of the flame. One wonders...
if you think of it that's the part that's in contact with "cold" air so the transference of energy between that air and the reaction of the flame makes that part get cold faster than the tip of the blue cone
BUNSEN BURNER!
An inanimate cabon rod?
Taking all the credit again.
If safety is a concern, keep the blue flame when not using. Carbon monoxide is nasty.
second. great video
Professor Bunsen Honeydew.
Can Professor Poliakoff play a game of chess with one of the other scientists, I feel like he would be good.
Who else is doing chemistry revision???????????
i dont see where the turbulence comes from
Austin Nguyen - when gas flow exceeds a certain velocity it changes from laminar flow to turbulent flow. I suspect that air currents are also a contributing factor with the flame.
Who else thought that this was a thunderf00t video?
Not anyone who noticed the lack of insufferable smugness.
Well what about the smugness of not correcting themselves on the sodium explosion? Pretty shameful display for a scientist.
whuzzzup You need to look up the meaning of the word smug. If you don't own a dictionary (and I'm prepared to bet money that you do not) there are plenty on the web.
I once burnt my entire hand by stupidly grabbing onto it just as i turned it off in class. It just stuck to my skin like glue.
In school we only had teclu burner
wtf we are instructed to never use lighters on burners, always matches.but one day a substitute teacher came and used a butane lighter .-. i dunno
Ethan D. i think they insist on matches because of obvious safety advantages
can you guys do a video on Brad's magnificent hair
this is all correct
3.14 15298749489503840143180849474983843458
oh i know
Yaaa
First!
It's called a Bunsen burner not because Bunsen invented it, but because it burner poor Prof. Bunsen.
Under 301 club
I realy like the vids but pls not evry Video with thermal imaging or at least not as the main point off the Video i doenst mean that those Videos are bad they are really nice but a little bit change would be nice :)
TRUMP 2020
Could you please make a Video about how chemits discover the shape of a molecule. I'm really intrested in this topic but I dont know how they discover it and it would be so nice if you do a video about it.