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Author: Subject: Candle Wax Water Explosion Experiment Explantion required
EliasExperiments
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[*] posted on 12-11-2020 at 10:45
Candle Wax Water Explosion Experiment Explantion required


Hi, I've made a video of the classic candle wax water explosion demonstration, but to make it more interesting I have also tried some other liquids like acetone, gasoline and liquid butane:

https://youtu.be/XQ_t7-w2uDA

Interestingly enough the reaction with acetone and gasoline turned out to be quite spectacular, while whith the liquid butane, even though it is colder and more volatile it didn't really do anything.

Does anybody have an idea why that is?

I can only guess and I don't want to write my ideas down already, so I don't stop anybody who might come up with a better idea.
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njl
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[*] posted on 12-11-2020 at 11:00


Maybe it's the leidenfrost effect between the hot wax and butane.
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Fluorite
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[*] posted on 12-11-2020 at 12:40


Ahaha I just remembered! two months ago I tried burning some sulfur using a candle but I accidentally dropped sulfur in the molten wax and it started bubbling H2S I guess :/ I freaked the f out and I poured water in it and I almost lost my vision! A hUGE FIRE BALL appeared out of nowhere! Also H2S wasn't going to poison me because it'll simply burn to SO2 :)
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EliasExperiments
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[*] posted on 13-11-2020 at 11:06


@njl yeah that what I was guessing too. But still weird, that it doesn't explode after the leidenfrost effect stops.

@Fluorite Lol that is an amazing story. :D Very interesting that wax and sulfur react to form H2S I didn't know that. I guess that is very good to know!
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Morgan
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[*] posted on 14-11-2020 at 18:41


One thing about comparing the evaporation of say water and methanol is that water takes a little over twice as many calories or it can cool twice the amount as it evaporates. But the rate at which alcohol evaporates is much greater and perhaps something like that partially explains why butane was so much more tame than ice cold water.
https://www.engineeringtoolbox.com/fluids-evaporation-latent...

[Edited on 15-11-2020 by Morgan]
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pneumatician
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[*] posted on 5-5-2021 at 05:15


Quote: Originally posted by EliasExperiments  


Interestingly enough the reaction with acetone and gasoline turned out to be quite spectacular, while whith the liquid butane, even though it is colder and more volatile it didn't really do anything.

Does anybody have an idea why that is?

I can only guess and I don't want to write my ideas down already, so I don't stop anybody who might come up with a better idea.




[Edited on 5-5-2021 by pneumatician]
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draculic acid69
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[*] posted on 5-5-2021 at 18:03


Quote: Originally posted by Fluorite  
Ahaha I just remembered! two months ago I tried burning some sulfur using a candle but I accidentally dropped sulfur in the molten wax and it started bubbling H2S I guess :/ I freaked the f out and I poured water in it and I almost lost my vision! A hUGE FIRE BALL appeared out of nowhere! Also H2S wasn't going to poison me because it'll simply burn to SO2 :)


I think there's a rxn between the wax and the sulfur. I've seen this somewhere before but can't remember where. good idea for a poison candle though. Or a terrific gift for someone you don't like or feel totally indifferent to.
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draculic acid69
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[*] posted on 5-5-2021 at 18:24


Just watched the video. No way you didn't light yourself on fire.
Great video though. The entertainment with the chemistry
is a winning combination.
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