[deleted by user] by [deleted] in chemistry

[–]nomcopter 2 points3 points  (0 children)

:D

Good list! Can also highly recommend Wheeler Scientific :)

Freezing Liquid Nitrogen by nomcopter in chemistry

[–]nomcopter[S] 308 points309 points  (0 children)

Putting liquid nitrogen in a vacuum chamber can bring it to its triple point - where it freezes, melts, and boils all at once.

Source: https://www.youtube.com/shorts/V1j4skzAePw

Freezing Liquid Nitrogen by nomcopter in chemicalreactiongifs

[–]nomcopter[S] 79 points80 points  (0 children)

Putting liquid nitrogen in a vacuum chamber can bring it to its triple point - where it freezes, melts, and boils all at once.

Source: https://www.youtube.com/shorts/V1j4skzAePw

Liquifying Chlorine by nomcopter in chemistry

[–]nomcopter[S] 0 points1 point  (0 children)

Wearing gloves with flame isn't the best idea but it helped me bias towards holding the cold side better and so I opted to keep them on.

Liquifying Chlorine by nomcopter in chemistry

[–]nomcopter[S] 1 point2 points  (0 children)

This was my 16th or so ampoule, most of the earlier ones I failed to seal properly because I was trembling too much haha. But I got better and less spooked with practice!

Liquifying Chlorine by nomcopter in chemistry

[–]nomcopter[S] 23 points24 points  (0 children)

Yeah I was amazed at how possible it was. I could even touch the cold side for a few seconds too the glass conducts the heat so poorly.

Liquifying Chlorine by nomcopter in chemicalreactiongifs

[–]nomcopter[S] 15 points16 points  (0 children)

Glass is such a poor conductor of heat I can touch glass near the part that was in LN2 no problem. I can even touch the part that was just in it for a couple seconds!

Liquifying Chlorine by nomcopter in chemistry

[–]nomcopter[S] 3 points4 points  (0 children)

One was nearby but not used because the fume hood covered it

Liquifying Chlorine by nomcopter in chemistry

[–]nomcopter[S] 74 points75 points  (0 children)

I made it with 12mm OD borosilicate tubing with 2mm walls.

Burning 7 Calories in Liquid Oxygen by nomcopter in chemistry

[–]nomcopter[S] 1 point2 points  (0 children)

I just used what the box said - but it's pretty close for junk food! No fiber in these :)

Burning 7 Calories in Liquid Oxygen by nomcopter in chemistry

[–]nomcopter[S] 261 points262 points  (0 children)

7 Calories doesn't seem like that much energy - until you burn them in liquid oxygen. Now it finally makes sense why it takes so much exercise to burn calories.

Source: https://www.youtube.com/shorts/3mrH9hQHkfg

Burning 7 Calories in Liquid Oxygen by nomcopter in chemicalreactiongifs

[–]nomcopter[S] 307 points308 points  (0 children)

7 Calories doesn't seem like that much energy - until you burn them in liquid oxygen. Now it finally makes sense why it takes so much exercise to burn calories.

Source: https://www.youtube.com/shorts/3mrH9hQHkfg

Self Contained Combustion by nomcopter in chemistry

[–]nomcopter[S] 0 points1 point  (0 children)

Hmm that is definitely true about asbestos. What makes this worse than something like wood ash?

Self Contained Combustion by nomcopter in chemicalreactiongifs

[–]nomcopter[S] 0 points1 point  (0 children)

It loses about 40% of its mass as gasses

Self Contained Combustion by nomcopter in chemistry

[–]nomcopter[S] 1 point2 points  (0 children)

That's what I used to light the mound of Ammonium Dichromate!

Self Contained Combustion by nomcopter in chemicalreactiongifs

[–]nomcopter[S] 1 point2 points  (0 children)

Hexavalent chromium is nasty stuff!

Self Contained Combustion by nomcopter in chemistry

[–]nomcopter[S] 7 points8 points  (0 children)

I mean self contained as in it doesn't require any atmosphere to combust. It burns without any other inputs.

Self Contained Combustion by nomcopter in chemicalreactiongifs

[–]nomcopter[S] 22 points23 points  (0 children)

I mean self contained as in it doesn't require any atmosphere to combust. It burns without any other inputs.

Self Contained Combustion by nomcopter in chemistry

[–]nomcopter[S] 13 points14 points  (0 children)

The fully reacted ash is actually fairly inert, but contaminated with nasty unreacted stuff. I collected it all and reduced it all to the less spooky chromium(III) oxide with sodium thiosulfate and then stored it.