File:18. Лајденфростов ефект.webm
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Original file (WebM audio/video file, VP9/Vorbis, length 1 min 12 s, 1,920 × 1,080 pixels, 8.82 Mbps overall, file size: 75.17 MB)
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Leidenfrost boiling of water on a heated sphere
Summary[edit]
| Description |
Македонски: Демонстрација на Лајденфростов ефект. Во моментот кога многу загреано топче се става во топла (≈ 60 °С) вода, доаѓа до образување на обвивка од водна пара околу топчето. Парата е изолатор и не дозволува да дојде до контакт меѓу многу загреаното топче со значително поладната вода. Најнапред доаѓа до ладење на металната прачка која го држи топчето (помал волумен), со што доаѓа до вриење на водата во непосредна околина на прачката. По извесно време, како што се лади топчето, се губи обвивката од водна пара и доаѓа до директен контакт на загреаното топче и водата. Водата почнува интензивно да врие и капки вода прскаат од чашата. На крајот доаѓа до термичка рамнотежа меѓу водата и металот.
Осмислено и изведено од Марина Стојановска, Миха Буклески и Владимир Петрушевски, Институт за хемија, ПМФ, УКИМ, Скопје. English: Demonstration of the Leidenfrost effect. At the instant a heated metal ball is placed in warm (≈ 60°C) water, a layer of water vapour forms around the ball. The vapor acts as an isolator and does not allow direct contact between the heated metal ball and the significantly cooler water. At the beginning, the metal rod cools faster (its volume is smaller), making the nearby water to boil first. After a while, as the ball cools down, the layer of water vapour disappears and the water comes into contact with the heated ball. The water starts boiling intensively and drops are splashed out of the beaker. At the end, the water and the ball reach thermal equilibrium. 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 | Petrovskyz |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 00:47, 18 October 2016 | 1 min 12 s, 1,920 × 1,080 (75.17 MB) | Petrovskyz (talk | contribs) | User created page with UploadWizard |
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