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(io9)   Hydrogen explosion vs. oxygen explosion: Here comes the science   (io9.com) divider line 51
    More: Interesting, hydrogen explosions, explosions, oxygen  
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4606 clicks; posted to Geek » on 24 Feb 2014 at 4:34 PM (29 weeks ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2014-02-24 04:12:01 PM
liquid oxygen is some pretty scary shiat

if you spill it on tarmac, it creates an explosive volatile enough to go off by stepping on it
 
2014-02-24 04:24:39 PM

sprawl15: liquid oxygen is some pretty scary shiat

if you spill it on tarmac, it creates an explosive volatile enough to go off by stepping on it


Let's do that then.
 
2014-02-24 04:44:20 PM
Enjoy your death blimp
 
2014-02-24 04:46:27 PM

Fano: Enjoy your death blimp


The title of the worst stag film ever.
 
2014-02-24 04:47:17 PM
Um ... 7th grade chemistry ... combustion reactions ...anyone?
 
2014-02-24 04:48:22 PM
Danger Zone!
 
2014-02-24 04:50:45 PM
If you never paid attention in chemistry, that might surprise you.  Otherwise it's pretty damned basic.
 
2014-02-24 04:54:51 PM
Fire doesn't burn oxygen.

It breathes it.
 
2014-02-24 04:54:52 PM

sprawl15: liquid oxygen is some pretty scary shiat

if you spill it on tarmac, it creates an explosive volatile enough to go off by stepping on it



It makes a quick barbeque starter too.
 
2014-02-24 04:55:31 PM
While a straight H2 baloon is more energetic than a straight H2 balloon I would rather handle the H2 balloon.  The amount of heat able to be generated is less than the O2 should something go bad.

CSB
This is making me remember the one time a friend of mine wanted to use up all the tanks on his rented OxyAcetaline unit, so he and a buddy started exploding larger and larger balloons filled with as close to stociomatic mixtures as they could get it.... until the 2' dia balloon poped in my buddy's hand.  2 sets of ruptured eardrums and one guy lost some eyebrows.  Ya, dont mix beer and explosive gas mixtures.
 
2014-02-24 05:01:49 PM
My freshman chemistry professor on the first day of class ignited a hydrogen filled balloon, an oxygen filled balloon, and then a balloon filled with a mixture of the two.
 
2014-02-24 05:03:55 PM
I remember a warning about using LOx to ignite charcoal, make sure there's some flame to start. If you apply fire to oxygen soaked briquets they go boom like dynamite.

I'm a little surprised the latex didn't burn, but the oxygen dispersed in a hurry. Became a region of slightly enriched air. One of my personal favorites is a garbage bag full of acetylene, aka a Hindenberg bomb.
 
2014-02-24 05:04:58 PM
In other words, an combustion reaction versus a balloon popping.
 
2014-02-24 05:05:06 PM
Even American Youtube artists are now ripping off the British when it comes to ideas for programming.
 
2014-02-24 05:06:47 PM
Oh, the huge chemistry
 
2014-02-24 05:07:18 PM
George Goble approves.
 
2014-02-24 05:10:35 PM
WHAR SLO MO? WHAR?!?!
 
2014-02-24 05:21:17 PM
when I was a cub scout the tour of the local firehouse included a fun moment where they took a paint can, poked a hole near the base and a small one in the center of the top, then filled it with some lighter-than-air flammable gas (methane, maybe).

The guy took his thumb off of the base and lit the gas coming up out of the top, which burned like a pretty candle for about 5 minutes until the flame got smaller and smaller, then finally lit the gas inside which blew the lid off of the paint can.   Very cool.
 
2014-02-24 05:21:23 PM

JayCab: Even American Youtube artists are now ripping off the British when it comes to ideas for programming.


All the best youtube artists use time travel to steal ideas.
 
2014-02-24 05:21:46 PM
FTA: Oxygen, being present at many explosions, has gained a rather bad reputation. Some people think that oxygen is explosive. As we can see in this experiment, oxygen, while not being completely innocent, is no more than an accessory.

Thank you, thank you, thank you.

Basic chemistry, but I find I have to point out to people that oxygen, while not an inert gas, is not explosive by itself.
 
2014-02-24 05:21:50 PM

sprawl15: liquid oxygen is some pretty scary shiat


I see where you're going with this, but basically anything that cold is pretty scary shiat.
 
2014-02-24 05:36:39 PM
We used to learn stuff in school.
 
2014-02-24 05:40:00 PM

semiotix: sprawl15: liquid oxygen is some pretty scary shiat

I see where you're going with this, but basically anything that cold is pretty scary shiat.


liquid oxygen has the fantastic property of making pretty much everything it touches incredibly flammable

liquid, say, nitrogen is certainly dangerous but not that dangerous
 
2014-02-24 05:40:50 PM

ko_kyi: when I was a cub scout the tour of the local firehouse included a fun moment where they took a paint can, poked a hole near the base and a small one in the center of the top, then filled it with some lighter-than-air flammable gas (methane, maybe).

The guy took his thumb off of the base and lit the gas coming up out of the top, which burned like a pretty candle for about 5 minutes until the flame got smaller and smaller, then finally lit the gas inside which blew the lid off of the paint can.   Very cool.


Same principal behind the BLEVE.  It's all fun and games until you start adding more 02 to the mix. As more liquid boils away more 02 mixes in and then pop. When you hear something on fire whistling, move away. The higher the pitch, the faster you need to move.
 
2014-02-24 05:42:21 PM
You know what else was a Hydrogen/Oxygen explosion?

img.fark.net


/ Too soon?
 
2014-02-24 05:45:00 PM
Blofeld is shipping smoked salmon?
 
2014-02-24 05:46:56 PM

ko_kyi: when I was a cub scout the tour of the local firehouse included a fun moment where they took a paint can, poked a hole near the base and a small one in the center of the top, then filled it with some lighter-than-air flammable gas (methane, maybe).

The guy took his thumb off of the base and lit the gas coming up out of the top, which burned like a pretty candle for about 5 minutes until the flame got smaller and smaller, then finally lit the gas inside which blew the lid off of the paint can.   Very cool.



This sounds like a firefighter trolling for more business. Really, who would should a bunch of kids how to do something like that?

///gonna try it as soon as I get home!
 
2014-02-24 05:55:25 PM
www.historyvortex.org

Hey, I heard you guys got an oxy--oh, "explosion!" I thought you said "destroyer!" Nvm.
 
2014-02-24 06:16:10 PM

ko_kyi: when I was a cub scout the tour of the local firehouse included a fun moment where they took a paint can, poked a hole near the base and a small one in the center of the top, then filled it with some lighter-than-air flammable gas (methane, maybe).

The guy took his thumb off of the base and lit the gas coming up out of the top, which burned like a pretty candle for about 5 minutes until the flame got smaller and smaller, then finally lit the gas inside which blew the lid off of the paint can.   Very cool.


Had a Chemistry Teacher in HS that did this with an upside-down Pringles can. At some point, the custodial staff stopped replacing the ceiling tiles in his lab ... Was lucky enough to be in the last class he taught before retiring, on that day, not a single fark was given, and there were many explosions
 
2014-02-24 06:28:51 PM
Blowing up balloons is always cool, but this is literally third grade science.
 
2014-02-24 06:37:23 PM
Something doesn't make sense there. The oxygen only (red) balloon is tied by a string like the others and floating. Oxygen is not lighter than air. Is it?
 
2014-02-24 06:40:02 PM
I checked. Oxygen is heavier than air.
 
2014-02-24 06:49:20 PM
It looks like the oxugen baloon was heald up by a wire. The "string" fell towards  the camera in a very straight line...
 
2014-02-24 06:50:26 PM
Argh, I should have used preview...  Oxygen not oxugen.
 
2014-02-24 07:09:37 PM
cdn-s3.thewrap.com

Chemistry is about....transformation!
 
2014-02-24 07:36:43 PM

ko_kyi: when I was a cub scout the tour of the local firehouse included a fun moment where they took a paint can, poked a hole near the base and a small one in the center of the top, then filled it with some lighter-than-air flammable gas (methane, maybe).

The guy took his thumb off of the base and lit the gas coming up out of the top, which burned like a pretty candle for about 5 minutes until the flame got smaller and smaller, then finally lit the gas inside which blew the lid off of the paint can.   Very cool.


I remember seeing that on mr wizard or something along those lines, only it was an upside down pringles can that had hole about the size of a dime cut in the lid with a small pinhole in the metal bottom.  Spray in some hydrogren through the lid, light the pinhole, stand back and wait for liftoff.  Of course the first thing I did was get my hands on some hydrogen and try it in the backyard...
 
2014-02-24 07:57:21 PM
Just keep in mind, that when you make an aluminium shelled electrolysis cell to fill balloons with perfectly stoichiometric HHO mixes for fun and games, that grounding the chassis to a GFO outlet was a commendable safety consideration, but you are going to build up a fair charge walking across the carpet to retrieve the filled balloon...
 
2014-02-24 09:09:58 PM
wildcardjack:
I'm a little surprised the latex didn't burn, but the oxygen dispersed in a hurry.

If you watch these sorts of things in slow motion, the balloon is gone before anything actually starts to burn.  Even with the hydrogen/oxygen mixture, the balloon is outta there before the first signs of the gas inside catching light.
 
2014-02-24 09:47:25 PM

Raoul Eaton: This sounds like a firefighter trolling for more business. Really, who would should a bunch of kids how to do something like that?


I know that was a rhetorical question, but the answer is a bunch of kids in Outer Bumfark, Midwest in a more innocent time, 35 years ago.  To be honest me and my friends spent whole summers burning things, blowing things up, and crafting our own fireworks.  I once spent a whole afternoon with a buddy as we sliced up fireworks with exacto knives, creating a tightly wound bomb with the consolidated powder, winding it with duct tape, all so we could make a big friggin bang in the middle of nowhere.  That was when we weren't floating opposing boat models in the river and attacking the opposing ship with a short half-inch pipe and bottle rockets.

It was pretty damned fun, but behavior like that today would put us on a BATFE watch list in a heartbeat.  Once a friend had a beat up old truck and we rigged it with pipes on the roof, glued nose cones on model rocket engines, and taped the solar igniters in place wired to a button on the dash.  It was like playing Road Warrior.
 
2014-02-24 09:49:34 PM

ko_kyi: It was like playing Road Warrior.


I might add there were no witnesses other than cows and jackrabbits.
 
2014-02-24 11:17:56 PM
And if you want a REALLY big explosion, hydrogen wins again.

www.mrwallpaper.com
 
2014-02-24 11:37:16 PM
(and incidentally, the best mix of the two will include between 71 and 80 percent hydrogen)

... wow, look who failed high-school chemistry.

The most effective mix (the one that will go to completion) will have 66.6(recurring)% Hydrogen by volume, dipshiat.  The only reason you're having extra flare from 70-80% is that that's the extent that atmospheric oxygen will mix in before the oxidation self-extinguishes.
 
2014-02-25 12:24:40 AM

Unobtanium: FTA: Oxygen, being present at many explosions, has gained a rather bad reputation. Some people think that oxygen is explosive. As we can see in this experiment, oxygen, while not being completely innocent, is no more than an accessory.

Thank you, thank you, thank you.

Basic chemistry, but I find I have to point out to people that oxygen, while not an inert gas, is not explosive by itself.


Not that you can't have a bad day with it.
i.imgur.com
 
2014-02-25 02:34:26 AM
DarkVader

And if you want a REALLY big explosion, hydrogen wins again.

Crossroads Baker was not a hydrogen bomb.
 
2014-02-25 04:18:37 AM
oxygen isn't flammable
 
2014-02-25 04:22:36 AM

studebaker hoch: DarkVader

And if you want a REALLY big explosion, hydrogen wins again.

Crossroads Baker was not a hydrogen bomb.


www.brookings.edu

//Ivy Mike FTW
 
2014-02-25 08:22:36 AM

sprawl15: liquid oxygen is some pretty scary shiat

if you spill it on tarmac, it creates an explosive volatile enough to go off by stepping on it


I design oxygen and hydrogen generators.  Had to get and ASTM certification in both handling and designing equipment.  This is a not so safe for work video that the Navy made  http://www.youtube.com/watch?v=Q9sIT6P_05I
 
2014-02-25 09:39:16 AM
I'd like to see an oxygen balloon lit in an atmosphere of 20% Hydrogen and 80% Nitrogen...
 
2014-02-25 01:15:42 PM

Saiga410: one time a friend of mine wanted to use up all the tanks on his rented OxyAcetaline unit, so he and a buddy started exploding larger and larger balloons filled with as close to stociomatic mixtures as they could get it....


Don't ever do this. I watched a friend almost kill himself with a garbage bag filled with an Oxy Acetylene mix. I use torches at work and I'm still wary of them because of what I saw that day almost 20 years ago.
 
2014-02-25 01:28:13 PM

pinchpoint: Saiga410: one time a friend of mine wanted to use up all the tanks on his rented OxyAcetaline unit, so he and a buddy started exploding larger and larger balloons filled with as close to stociomatic mixtures as they could get it....

Don't ever do this. I watched a friend almost kill himself with a garbage bag filled with an Oxy Acetylene mix. I use torches at work and I'm still wary of them because of what I saw that day almost 20 years ago.


I did it with hydrogen and oxygen in garbage bags. Fill the bag, tie a
long toilet paper streamer to it, light said streamer and release.

Made it maybe 100 ft up before
going off and setting off car alarms in the dealership next door.

LN2 in a sealed pop bottle is always fun too.
 
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