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Forums
4hv.org :: Forums :: Chemistry
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Cool chemistry experiment . . .

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Desmogod
Tue Jun 27 2006, 03:07AM
Desmogod Registered Member #139 Joined: Sat Feb 11 2006, 11:01AM
Location: Perth, Western Australia
Posts: 358
 		Do it at high altitude wink
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joshua_
Thu Jun 29 2006, 06:48AM
joshua_ Registered Member #61 Joined: Thu Feb 09 2006, 05:50AM
Location: Mountain View, CA
Posts: 43
 		For a long time, the video that kalenedrael and I made was hanging out in the top 10 on Google Video. Today we appear to be #43, though; after the World Cup, we got displaced rather rapidly. Oh well -- we were there for a good few weeks or so...
Diet Coke and Mentos Reaction
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Electroholic
Thu Jun 29 2006, 07:09AM
Electroholic Registered Member #191 Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
 		i think you would want most co2 dissolved in teh water as possible.
so i dont'; think heat/low pressure will help the situation.
you will just get yrouself wet trying to open the bottol at the first place.
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Richy
Thu Jun 29 2006, 01:22PM
Richy Registered Member #121 Joined: Fri Feb 10 2006, 12:39PM
Location: Bromley, UK
Posts: 10
 		How about breaking the Mentos into smaller pieces so they have a larger surface area which I'm guessing would make a faster reaction?
Richy.
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Mike
Mon Aug 14 2006, 07:52PM
Mike Registered Member #58 Joined: Thu Feb 09 2006, 05:40AM
Location: Tri-Cities, Washington, US
Posts: 317
 		According to the Myth busters episode this, the mentos have a surface full of tiny holes, like the surface of the moon, craters or what ever, and each one is a place for a bubble of co2 to form and escape. They tested this by dropping the mentos in that have a kind of wax coating and it didn't do much.
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Bjørn
Mon Aug 14 2006, 10:22PM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
 		So if it was not the surface shape that caused the bubbles but a chemical reaction then the wax caoting would not made a difference?
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Hazmatt_(The Underdog)
Tue Aug 15 2006, 02:22AM
Hazmatt_(The Underdog) Registered Member #135 Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
 		Mythbusters, Answer: Nucleation

Wax inhibited reaction.

Rockets did not work well enough. Not enough thrust per unit weight.
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Bjørn
Tue Aug 15 2006, 02:44AM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
 		My point is that wax would inhibit any reaction by keeping the soda away from the surface. So you learn nothing except that wax can be used to cover a surface and that has been know for 5-6 million years.
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Nik
Tue Aug 15 2006, 06:48AM
Nik Registered Member #53 Joined: Thu Feb 09 2006, 04:31AM
Location: Ontario, Canada
Posts: 638
 		I would advise against rockets that use 2L pop bottles and rely on the internal pressure casing the cap to fly off on its own. I have seen a grizzly picture of a kid that got hit by the cap of a Dry ice rocket.
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Electroholic
Tue Aug 15 2006, 12:24PM
Electroholic Registered Member #191 Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
 		if its the holes, then how about somehting like activated carbon?,
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