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Morgan
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Something in common.
Barking Dog (slow motion) - Periodic Table of Videos
http://www.youtube.com/watch?v=c3fJRRCAIdk#t=2m6s
Jam Jar Pulse Jet Schlieren
http://www.youtube.com/watch?v=q1LQ94pjUWE
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rocketsurgeon
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cool
I've seen the periodic table of videos one but i haven't seen the other one.
and i have another video out 
calcium metal in water
[Edited on 6-8-2013 by rocketsurgeon]
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Hexavalent
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Firstly, I disapprove of new members creating new threads simply to advertise their YouTube channels. Secondly, I this is not the conventional
"barking dog" reaction, but the simple vapour-phase combustion of an alcohol, presumably ethanol; you fail to explain any of the science behind this,
and thus I would not classify this as a "good" "video". Thirdly, I would advise you not to conduct this reaction in a volumetric flask which you may
later use for quantitative work, as heating the glass naturally expands it, causing it to cool relatively unpredictably, which ultimately affects the
accuracy of the flask.
"Success is going from failure to failure without loss of enthusiasm." Winston Churchill
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Pyro
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I agree with Hex on the first part, but not on the second. The temperature of burning alcohol is not that high and the time of exposure so short that
the chance of it affecting the glass is practically nonexistent.
For extra WOW effect add H3BO3 to the alcohol, it makes it green!
all above information is intellectual property of Pyro.  |
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bfesser
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<strong>Hexavalent</strong>, I'll merge this into an existing thread. As for the flask, it's not like it's a serialized Class A from a
top manufacturer—that's the Bomex logo (Chinex).
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bfesser
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Threads Merged
6-8-2013 at 13:01 |
Morgan
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I once toyed with a similarly shaped 800 ml Kjeldahl flask and methanol to see how it would bark. I entertained the thought of buying one made of
quartz but they're awfully pricey. It would be nice to not have to worry about heat stress, say if you could design something in quartz for sustained
barking while visually appealing. http://www.technicalglass.com/product_pages/fused_quartz_lab...
In cool dry air methanol will produce a cracking bark using a typical closed at one end tube. I used to delight in the sound a ~3 cm wide by 50 cm
long cylindrical pipe would make by sealing one end with my hand or rubber stopper and lighting the open end with a flame, the pipe held somewhat
horizontally. The sharp crack is quite sudden and much louder than one might suspect. The pipe can be quickly refreshed and lit again a few times
using the residual/unspent alcohol coating the inside of the tube. I recall trying a copper pipe as well with a flare on the end which made brilliant
green flashes of light, along with an almost hurts your ears bark, the first few times beautiful before the patina was used up. If you've played with
methanol a lot, you find it really gets perky in stoichiometric cool dry air.
One other very loud effect was brought about by unscrewing the head off of a small pulsejet I have, a Dynajet with a 2.5 inch combustion chamber
necking down to a 1.25 inch exhaust pipe. Without the head the length is about 19 inches. I would coat the inside walls with methanol, hold the flat
of my hand over the wide front end and light the tailpipe producing a very energetic bark. The flame front so brief, my hand never sensed much heat.
Tidbit of history and hopefully the story not too worn out yet.
"As I Looked around after the terrible explosion in the room where the audience sat, and saw the blood running from the faces of Queen Therese and
Prince Luitpold, my horror was indescribable; I was half dead. Fortunately, the accident had no further unpleasant consequences. their Majesties
behaved in a noble and high-minded way, and all of their concern seemed to focus itself only on me. The Queen sent her personal physician to me that
very evening, and every day their majesties inquired with respect to my health. Old King Ludwig himself came the next day and asked if my wound was
serious, and when I said No he exclaimed: Then everything is all right; so long as nothing happened to you, the rest is nothing..."
http://www1.chem.leeds.ac.uk/delights/texts/expt_22.html
I liked the hydrogen/chlorine "flame"/high-speed barking dog scenario here - somewhat exotic.
http://www.youtube.com/watch?v=xPVyAAkYwXk
Here methanol and pure oxygen seem a bit too perky for barking in a long glass tube.
http://www.youtube.com/watch?v=umgjXTe3SWg
[Edited on 7-8-2013 by Morgan]
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Gooferking Science
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My channel is in my signature.
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Heuteufel
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Here is my Channel: Heuteufels Channel
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TheChemiKid
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I have a youtube channel: http://www.youtube.com/TheChemiKid
When the police come
\( * O * )/ ̿̿ ̿̿ ̿'̿'̵͇̿̿з=༼ ▀̿̿Ĺ̯̿̿▀̿ ̿ ༽
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bismuthate
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Funny I was just watching one of your videos when you made that post. Great channel!
Also should there be a SM youtube channel for all collabratory videos and such?
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TheChemiKid
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I am willing to be a collabratory channel.
When the police come
\( * O * )/ ̿̿ ̿̿ ̿'̿'̵͇̿̿з=༼ ▀̿̿Ĺ̯̿̿▀̿ ̿ ༽
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TheChemiKid
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Quote: Originally posted by hkparker  | | yay for promoting youtube scientists! I got started on the youtube community before I come on sciencemadness, talking frequently with Myst32YT,
Mewrox99, Alchemical garden, among other, and recently there has been a push from us youtubers to come here! Please check out my channel, www.youtube.com/user/hkparker, ive been doing it for about 6 months. |
Have you stopped making videos? It has been more than a year since you have uploaded a video.
When the police come
\( * O * )/ ̿̿ ̿̿ ̿'̿'̵͇̿̿з=༼ ▀̿̿Ĺ̯̿̿▀̿ ̿ ༽
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