File:Make solid oxygen with this trick Freezing in liquid helium.webm
Original file (WebM audio/video file, VP9/Opus, length 2 min 58 s, 1,920 × 1,080 pixels, 1.42 Mbps overall, file size: 30.16 MB)
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English: Vacuum pump manufacturers hate this trick: Prof. Pottlacher shows in this video, how to make solid oxygen without a vacuum pump.
First, it is shown how to distill gaseous oxygen in liquid nitrogen. The resulting liquid oxygen already has a bluish color and is paramagnetic. For the production of solid oxygen one uses either extremely low pressure or extremely low temperatures. In order to produce solid oxygen by means of pressure reduction, a special pump is required, which is able to lower the surrounding pressure to 0.0015 bar. Alternatively, solid oxygen can created by freezing in liquid helium. With 4.2 Kelvin or -269 ° Celsius, helium has the lowest boiling point of all gases, which is why liquid helium is the coldest substance on earth. Real solid oxygen then has a bluish color again and is also paramagnetic. Many thanks to Prof. Knoll, Prof. Heinz Krenn and Jacob Reynvaan for facilitating this experiment at the KFU Graz. |
| Date | |
| Source | YouTube: Make solid oxygen with this trick: Freezing in liquid helium – View/save archived versions on archive.org and archive.today |
| Author | iMooX at |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:33, 18 January 2021 | 2 min 58 s, 1,920 × 1,080 (30.16 MB) | Tnt1984 (talk | contribs) | Uploaded a work by [https://www.youtube.com/channel/UC4XmEpSP44Gi3kcfOt5GNVQ iMooX at] from https://www.youtube.com/watch?v=ik9J9NgBhoc with UploadWizard |
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