File:Explosion of methanol (coloured with boric acid).jpg
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English: This image depicts a classic experiment. A small amount of methanol is poured into a large polycarbonate water bottle. After letting the methanol to evaporate a burning splint is held at the mouth of the bottle. This results in an explosion since the bottle is now filled with a combustible vapour (namely methanol) and air. Methanol produces a blue flame but we dissolved a bit of boric acid in our sample which resulted in a green flame. (Boric acid forms an ester with methanol which turns the flame into green.) This experiment is an excellent and fun way to teach the differences between a simple combustion and an explosion. The picture was taken in a collaboration with my colleague, Ildikó Radnai. Magyar: A képen egy klasszikus kísérletet örökítettünk meg. Egy irodai vizespalackba egy kevés metanolt töltöttünk, majd hagytuk elpárologni a folyadékot. Ezután égő gyújtópálcát tartottunk a palack szájához. Ez egy robbanást eredményezett, hiszen a palack éghető anyag gőzeit (a metanolét) és levegőt tartalmazott. A metanol kék lánggal ég, de a mi mintánk kevés bórsavat is tartalmazott. (A bórsav észtert képez a metanollal, amely zöldre festi a lángot.) Ez a kísérlet egyszerre kiváló és szórakoztató módja annak bemutatására, hogy mi a különbség az egyszerű égés és a robbanás között. A képet Radnai Ildikó kollégámmal közösen készítettük. English: Explosion of a methanol-air mixture - with a hint of boric acid. |
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| Source | Own work |
| Author | Sjtanarur |
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I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
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This image was uploaded as part of European Science Photo Competition 2015. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 01:45, 29 November 2015 | | 860 × 1,860 (1.23 MB) | Sjtanarur (talk | contribs) | User created page with UploadWizard |
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