Burning Magnesium Alloy

[67oesen]

A BIG STEP FORWARD FOR SCIENCE!

[paradoxunion]

was that a pencil sharpener?

[LechuCzechu]

@paradoxunion Yes

[ichanter]

i thin i just got flashburned... again

[anthony16r]

Hi, very nice video but magnesium doesn't burn at 1370°C but approximately 3100°C

[LechuCzechu]

@anthony16r It probably depends on the oxygen percentage in the atmosphere. Some of the sources on the internet are self contradictory on the exact temp. of combustion.

[tracemaster100]

i see. so that explains the color temperature level... i think. getting hotter it would be like red then orange then candle white then snowy day white then lightning white like in your video. if it is possible, what level would be after that?

[LechuCzechu]

@tracemaster100 Since I can't post links here - you want to go to Wikipedia and search 'Planckian locus'. Its basically a chart which shows relation of radiation color and body temperature.

[soccerplyr18]

TRON!!!!!!!

[RedgardH]

2:52 elektrownia Kozienice! Skąd masz taki talerzyk?

[LechuCzechu]

@RedgardH Kupiłem na wagę w sklepie firmowym firmy "Ćmielów" produkującej porcelanę użytkową.

[RedgardH]

a tak pytam bo mieszkam o rzut moherem od elektrowni; w sumie to z elektrownią Czarnobyl też mogliby robić

[theconquistador101]

If you filed down the sharpener would it work as magnesium powder to use with KNO3 to make a flash powder?

[LechuCzechu]

@theconquistador101 Yes! :D But first try to buy some magnesium powder online. Its cheap.

[iGeekPro]

Nice way to burn your house down there.

[Mikeyburger3]

wow huge piece. Im not supprised you melted the plate lol!!! You seem to know a lot about it. Is the 2500 celsius value the Constant pressure adiabatic (+ stoichiometric) value or is it the actual temperature of the flame here ~? As a comparrison the hottest part of a massive bonfire flame is about 1000 celsius :P

[LechuCzechu]

Actually the temp. 2500 C is a bit to high. The real one is "only" about ~1400-1600 C (as high as >2000 would be achieved in rich oxygen atmosphere). The plate didn't melted - it cracked due to heat shock - the part of the plate touching the magnesium exapnded more rapidly than the rest. I don't think this temp. is an adiabatic flame as its only the case for ideal combustion process. I'm not really that deep into thermodynamics to anwser this :)

[Mikeyburger3]

thanks for your reply, I agree 2500 celsius is too high, I think in this case it is closer to 2000 though. Since the reaction happens very fast it moves the balance of heat loss. because really thats the only thing that lowers it. it may not be 1:1 stoichiometric but that is only because there is nitrogen in the equation, that absorbes some heat. But true melting large objects is more to do with Heat as opposed to temperature, which is very different. I think combustion is fascinating!

[busterlanger]

Does that smell bad???

[LechuCzechu]

Not really. There was some smell present for couple of minutes but nothing very repulsive.

[Mikeyburger3]

Something that has always interested me is combustion of Metals. Does the Flame temperature rise thew more reactive elements... I mean what happens with say Caesium or Potassium!!?

[LechuCzechu]

This is a good question, however I don't know the answer. Probably you are right - the more reactive the metal the stronger it wants to bond with oxygen, which gives faster reaction (and more heat). But, bear with me, I'm not a chemical engineer, so I don;t know for sure :)

[omegahunter9]

@Mikeyburger3 I know that Lithium burns a bit like magnesium, however I wouldn't say that the flame temperature has all that much relation to it's reactivity.

[seantopperharley]

This is cool science! Thanks for posting.

[AScannerClearly]

I knew I recognized that track from somewhere! Great video, hope I can find some Mg sharpeners over here in the States! =D

[mrchristian9house]

hey at least you till can use part of the sharpener

[JpRUBB1SH]

wow very nice

[keynell4]

is this music from the first Unreal Tournament?

[LechuCzechu]

Yes, track name is Nether

[wildusers2]

cool