File:84. Горење брашно.ogg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file(Ogg multiplexed audio/video file, Theora/Vorbis, length 14 s, 1,920 × 1,080 pixels, 8.67 Mbps overall, file size: 14.21 MB)

Captions

Captions

Add a one-line explanation of what this file represents

Summary[edit]

Description
English: Flour can burn

The household flour burns quite settled if exposed to open flame. In this case, only surface charring can be observed. However, if the flower dust is exposed to open fire, it will burn in flames. The reason for this behavior is in the contact surface between the particles. Small particles when dispersed have good contact with the air oxygen, so the burning will be easy and fast. In other words, when the contact area between the particles of the reactants is better, the speed of the reaction is greater. Taking into consideration that the main component of the flour is starch (70–75 %), the chemical reaction of the burning can be described by the equation:

(C6H10O5)n + 6n O2 = 6n CO2 + 10n H2O

Performed by the Prof. PhD Miha Bukleski. The planning of the experiment also included the retired Prof. PhD Vladimir Petruševski and the students Mihail Trajkov and Darko Stojčev, Department of Chemistry, FNSM, Ss. Cyril and Methodius University, Skopje, Macedonia.
Македонски: Горење на брашно

Брашното што се користи во домаќинството, ако се изложи на директен пламен, речиси не гори (може да се забележи само јагленисување на неговата површина). Но, ако прашината формирана од брашното дојде во допир со отворен пламен, таа лесно ќе се запали. Причината за тоа е во допирната површина на честичките. Ситните честички кога се распределени како прашина имаат подобар допир со кислородот од воздухот, па во таков случај нивното горење ќе биде поедноставно и побрзо. Со други зборови, кога допирната површина на честичките е поголема и кога е овозможен добар допир меѓу реактантите (брашно и кислород) брзината на реакцијата е поголема. Со оглед на тоа што скробот е глвната компонента на брашното (70–75 %), горењето на брашното, грубо може да се претстави со равенката:

(C6H10O5)n + 6n O2 = 6n CO2 + 10n H2O

Изведено од Проф. д-р Миха Буклески. Во планирањето на опитот, исто така беа вклучени пензионираниот Проф. д-р Владимир Петрушевски, и студентите Михаил Трајков и Дарко Стојчев, Институт за хемија, ПМФ, УКИМ, Скопје, Македонија.
Date
Source Own work
Author Дени Ингилизовски


Licensing[edit]

I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
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/TimeThumbnailDimensionsUserComment
current18:15, 23 February 202314 s, 1,920 × 1,080 (14.21 MB)Dandarmkd (talk | contribs)Uploaded own work with UploadWizard

There are no pages that use this file.

Transcode status

Update transcode status
Format Bitrate Download Status Encode time
VP9 1080P 2.14 Mbps Completed 18:17, 23 February 2023 52 s
Streaming 1080p (VP9) 2.05 Mbps Completed 05:06, 13 January 2024 1.0 s
VP9 720P 1.08 Mbps Completed 18:16, 23 February 2023 28 s
Streaming 720p (VP9) 986 kbps Completed 10:12, 17 January 2024 2.0 s
VP9 480P 640 kbps Completed 18:17, 23 February 2023 20 s
Streaming 480p (VP9) 551 kbps Completed 01:21, 17 December 2023 1.0 s
VP9 360P 415 kbps Completed 18:17, 23 February 2023 15 s
Streaming 360p (VP9) 325 kbps Completed 14:31, 17 December 2023 1.0 s
VP9 240P 281 kbps Completed 18:17, 23 February 2023 10 s
Streaming 240p (VP9) 191 kbps Completed 02:07, 9 December 2023 1.0 s
WebM 360P 594 kbps Completed 18:17, 23 February 2023 20 s
Streaming 144p (MJPEG) 893 kbps Completed 05:39, 29 October 2023 1.0 s
Stereo (Opus) 90 kbps Completed 12:01, 12 November 2023 1.0 s
Stereo (MP3) 129 kbps Completed 23:43, 28 October 2023 2.0 s

File usage on other wikis

The following other wikis use this file:

Metadata