File:84. Горење брашно.ogg
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Description84. Горење брашно.ogg |
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 |
This file was taken during Wikiexperiments 2023 set up by Shared Knowledge.
You can see all the videos and images in the categories Chemistry experiments by Shared Knowledge, Physics experiments by Shared Knowledge, Biology experiments by Shared Knowledge and Wikiexperiments. English | македонски | +/− |
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current | 18:15, 23 February 2023 | 14 s, 1,920 × 1,080 (14.21 MB) | Dandarmkd (talk | contribs) | Uploaded own work with UploadWizard |
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