File:26. Горење на метали.ogv
Original file (Ogg multiplexed audio/video file, Theora/Vorbis, length 1 min 50 s, 1,920 × 1,080 pixels, 7.02 Mbps overall, file size: 91.99 MB)
Captions
Summary[edit]
Description26. Горење на метали.ogv |
Македонски: Седум различни метали во прав (по случаен избор: Zn, Fe, Mg, Al, Cu, Se, Ni), се ставени во епрувети, за поедноставна манипулација. За процесот на оксидација се користи гасна греалка. Металите во прав, полека и внимателно се „истураат“ директно во пламенот. Сите горат со различен интензитет; некои од нив искрат (Fe, Mg, Al), а кај некои пламетот е обоен (Cu, Zn, Se).
Најнапред во пламенот се внесува парче алуминиум. Металот се топи, но не гори. Потоа, се внесува алуминиум во прав. Тој се пали и гори фрлајќи искри. Ова укажува дека брзината на реакцијата зависи од големината на честичките. Колку што се честичките помали, толку брзината на реакцијата е поголема. Општата (и главна) равенка за оксидацијата на металите од овој експеримент, може да се запише како: x M(s) + y/2 O2(g) = MxOy(s) Осмислено и изведено од Марина Стојановска, Миха Буклески и Владимир Петрушевски, Институт за хемија, ПМФ, УКИМ, Скопје.English: Seven different powdered metals (in a random order: Zn, Fe, Mg, Al, Cu, Se, Ni) are placed in test tubes for easier manipulation. A burner (torch) is used to initiate the oxidation. The metal powders are slowly and cautiously poured directly into the flame. All of them burn with different intensities; some with sparks (Fe, Mg, Al), others produce colored flame (Cu, Zn, Se).
At the very beginning, a piece of aluminum metal is put in the flame. The metal melts but it does not burn. When aluminum powder is poured into the flame, it “catches fire” and burns with sparks. This implies that the speed of the reaction depends on the particle size: the smaller the particles the faster the reaction. The general (and main) equation for the oxidation of the metals used in this experiment can be written as: x M(s) + y/2 O2(g) = MxOy(s) Planned and performed by Marina Stojanovska, Miha Bukleski and Vladimir Petruševski, Department of Chemistry, FNSM, Ss. Cyril and Methodius University, Skopje, Macedonia. |
Date | |
Source | Own work |
Author | Карас Студио |
Licensing[edit]
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 12:28, 22 February 2020 | 1 min 50 s, 1,920 × 1,080 (91.99 MB) | Инокентиј (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
- File:26. Горење на метали.ogg (file redirect)
Transcode status
Update transcode statusFile usage on other wikis
The following other wikis use this file:
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Software used |
---|