[video=youtube;wwr6EgxeevE]http://www.youtube.com/watch?v=wwr6EgxeevE[/video]
I think what was happening between the hot metal and the water was the "Leidenfrost effect"
Who is this guy?
Aluminum isn't an alkali metal, which is what I gather the other video is talking about. He doesn't link to it and I'm not going to bother digging it up. Either way I'm pretty sure you don't need to heat alkali metals for the reaction with water to happen.
[QUOTE=thrawn2787;44802944]Who is this guy?
Aluminum isn't an alkali metal, which is what I gather the other video is talking about. He doesn't link to it and I'm not going to bother digging it up. Either way I'm pretty sure you don't need to heat alkali metals for the reaction with water to happen.[/QUOTE]
He was using alkali metals as an example wasnt he? He was citing that molten metals should explode or have a violent reaction in water the same way that alkali metals react in water in accordance to what periodictablevideos suggested, and basically disproved it, showing that aluminium does not react the same at all.
Basically he was criticizing periodictablevideos (youtube channel) videos because they claimed that dropping molten aluminium and dropped molten alkali metals into water utilized primarily the same mechanism, which they said was a thermal explosion. This guy got in contact with them and told them why they were wrong and apparently they told him to get lost.
[QUOTE=thrawn2787;44802944]Who is this guy?
Aluminum isn't an alkali metal, which is what I gather the other video is talking about. He doesn't link to it and I'm not going to bother digging it up. Either way I'm pretty sure you don't need to heat alkali metals for the reaction with water to happen.[/QUOTE]
If you watched the whole video, 'thunderf00t', explains that 'periodicvideos' is sending questionable information about the cause of the alkali metals exploding in contact with water. 'periodicvideos' says (according to thunderf00t) "The prime thing that makes alkali metals explode in water, is the metal heating the water above its boiling point."
Thunderf00t says; nope, I don't trust that explanation, watch what happens when I put something else in water that is far higher than water's boiling point (molten aluminum). *places it in water* no explosion. Therefore, I conclude that the reaction between the alkali metal and water does not explode because of the metal raising the water beyond its boiling point. The explosion happens for reasons that are actually not well understood.
Thunderf00t is a scientist that experiments with alkali metals.
[IMG]http://puu.sh/8LAbw/e6a3eb12f8.png[/IMG]
[IMG]http://puu.sh/8LAcz/86e337736a.png[/IMG]
[editline]14th May 2014[/editline]
[QUOTE=noh_mercy;44803355]If you watched the whole video, 'thunderf00t', explains that 'periodicvideos' is sending questionable information about the cause of the alkali metals exploding in contact with water. 'periodicvideos' says (according to thunderf00t) "The prime thing that makes alkali metals explode in water, is the metal heating the water above its boiling point."
Thunderf00t says; nope, I don't trust that explanation, watch what happens when I put something else in water that is far higher than water's boiling point (molten aluminum). *places it in water* no explosion. Therefore, I conclude that the reaction between the alkali metal and water does not explode because of the metal raising the water beyond its boiling point. The explosion happens for reasons that are actually not well understood.
Thunderf00t is a scientist that experiments with alkali metals.[/QUOTE]
Also he doesn't just experiment with alkali metals, lol.
[url]http://www.ncbi.nlm.nih.gov/pubmed/?term=Mason+PE[/url]
[QUOTE=noh_mercy;44803355]
Thunderf00t is a scientist that experiments with alkali metals.[/QUOTE]
[I]Aluminum is not an alkali metal[/I]
I'd still like to watch the original periodictablevideos video if anyone manages to find it. I'm not saying this guy is wrong about them being wrong (if they're saying it has to do with boiling point or some shit then they are), I'm just not getting what the fuck he's arguing. I feel like that original video was only talking about alkali metals.
Basically this video sucked at explaining what he was arguing. Maybe if he linked to the original video...
[QUOTE=thrawn2787;44804150][I]Aluminum is not an alkali metal[/I]
I'd still like to watch the original periodictablevideos video if anyone manages to find it. I'm not saying this guy is wrong about them being wrong (if they're saying it has to do with boiling point or some shit then they are), I'm just not getting what the fuck he's arguing. I feel like that original video was only talking about alkali metals.
Basically this video sucked at explaining what he was arguing. Maybe if he linked to the original video...[/QUOTE]
He doesn't usually experiment with Aluminum, this was just a concept video, he had to show a non-alkali metal to prove his point.
[video=youtube;D4pQz3TC0Jo]http://www.youtube.com/watch?v=D4pQz3TC0Jo[/video]
2:15
[QUOTE=thrawn2787;44804150]Maybe if he linked to the original video...[/QUOTE]
[video=youtube;D4pQz3TC0Jo]http://www.youtube.com/watch?v=D4pQz3TC0Jo[/video]
Also, he's picking the completely wrong point of the video and arguing something that no one has ever said in the video. The only thing that they said was that the water will become alkaline because of its reaction with the hydrogen in the water, creating cesium hydroxide. All he's doing is creating drama over nothing from nothing.
[editline].[/editline]
DAMN YOU!!
What about the other video; the one where they actually claim it has to do with boiling points? Either way I guess I see his point (and the other guy's point / mental retardation) now.
I'm actually curious now as to how a "chemist" could get that so horribly wrong.
[QUOTE=thrawn2787;44804314]What about the other video; the one where they actually claim it has to do with boiling points? Either way I guess I see his point (and the other guy's point / mental retardation) now.
I'm actually curious now as to how a "chemist" could get that so horribly wrong.[/QUOTE]
[video=youtube;mzEOL-N2cbw]http://www.youtube.com/watch?v=mzEOL-N2cbw[/video]
In this experiment they are using sodium which reacts violently with water and releases a great deal of heat. He is explaining why a reaction at 2:45 could have happened.
Again, his experiment is nothing close to what they are talking about in any matter other than the fact that the words "water" and "metal" are involved.
[editline]13th May 2014[/editline]
Thank goodness I wasn't ninja'd this time.
does nobody in this thread have any idea what they are talking about?
[QUOTE=Keitaro;44804216][video=youtube;D4pQz3TC0Jo]http://www.youtube.com/watch?v=D4pQz3TC0Jo[/video]
Also, he's picking the completely wrong point of the video and arguing something that no one has ever said in the video. The only thing that they said was that the water will become alkaline because of its reaction with the hydrogen in the water, creating cesium hydroxide. All he's doing is creating drama over nothing from nothing.
[editline].[/editline]
DAMN YOU!![/QUOTE]
like seriously what the fuck are you talking about
[editline]3:33[/editline]
[QUOTE=Keitaro;44804384][video=youtube;mzEOL-N2cbw]http://www.youtube.com/watch?v=mzEOL-N2cbw[/video]
In this experiment they are using sodium which reacts violently with water and releases a great deal of heat. He is explaining why a reaction at 2:45 could have happened.
Again, his experiment is nothing close to what they are talking about in any matter other than the fact that the words "water" and "metal" are involved.
[editline]13th May 2014[/editline]
Thank goodness I wasn't ninja'd this time.[/QUOTE]
and you're wrong too, the experiments are similar, the guy in OPs video is proving a point
[editline]3:33[/editline]
the professor guy in the other video argued that the explosive reaction of alkali metals in water is due to the fact that the initial violent reaction between the alkali metal and the water is so hot that it flashes the water surrounding it into steam (since steam occupies 1600 times the volume of water of the same mass you would think it may cause an explosion). the guy in OPs video is saying that's bogus because when you put a piece of white hot metal into water, (which is even hotter than the temperatures reached in a reaction between an alkali metal and water) it fails to flash the water into steam violently enough to cause an explosion. therefore, if white hot metal, which is hotter than an alkali metal and water reaction, can't cause an explosion when introduced to water, then how on earth could this be the property responsible for causing explosions when alkali metals are introduced to water?
that's the point he's making. it's actually extremely clear.
[editline]3:33[/editline]
though azza and noh_mercy explained this before i did and they were both right. still, everyone else seems to be talking out of their asses quite a bit
The guy is deaf, you can hear the hiss.
Considerably more heat to more cooled water is released in an active chemical reaction than through conduction. I say more cooled water because water in contact with an alkali metal reacts and is removed, allowing more cold water to make contact. OP's video merely proves conduction of heat does not heat water fast enough.
[QUOTE=subenji99;44805123]Considerably more heat to more cooled water is released in an active chemical reaction than through conduction. I say more cooled water because water in contact with an alkali metal reacts and is removed, allowing more cold water to make contact. OP's video merely proves conduction of heat does not heat water fast enough.[/QUOTE]
Yeah, I always thought it was because of the nature of the chemical reaction between alkali metals and water not conduction. Surely when alkali metals react with water the chemical reaction can produce more energy than just heating a piece of aluminium?
Thus Thunderf00t is essentially comparing apples to oranges here? Considering Aluminium is quite obviously inert compared to alkali's, thus the only thing that aluminum would do is create an oxide layer, where as the alkali's would strip some ions from the water creating volatile hydrogen or compounds of it?
[QUOTE=noh_mercy;44802523][video=youtube;wwr6EgxeevE]http://www.youtube.com/watch?v=wwr6EgxeevE[/video]
I think what was happening between the hot metal and the water was the "Leidenfrost effect"[/QUOTE]
The Mythbusters demonstrated the Leidenfrost effect by heating lead up to where it was a liquid, dunking their hands into ice water, then quickly submerging their hands into the molten lead.
Didn't burn or anything
[QUOTE=LoneWolf_Recon;44806499]Thus Thunderf00t is essentially comparing apples to oranges here? Considering Aluminium is quite obviously inert compared to alkali's, thus the only thing that aluminum would do is create an oxide layer, where as the alkali's would strip some ions from the water creating volatile hydrogen or compounds of it?[/QUOTE]
Please read the entire thread.
solsius
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