File:09. Гасење вар како силно егзотермен процес.webm
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Summary
Description09. Гасење вар како силно егзотермен процес.webm |
Македонски: Демонстрација на гасење вар како силно егзотермент процес. Кон парчиња негасена вар (калциум оксид, CaO) се додава вода од капалка, а температурата се контролира со електронски термометар. По кратко време започнува изразена егзоенергетска реакција („гасење вар“) што може да се опише со равенката:
Температурата може да се покачи до околу 300 ºС. Осмислено и изведено од Марина Стојановска, Миха Буклески и Владимир Петрушевски, Институт за хемија, ПМФ, УКИМ, Скопје.English: A demonstration of slaking of quicklime as a strongly exothermic reaction. Drops of water are added to pieces of quicklime. After a while, a pronounced exothermic reaction occurs ('slaking of lime') that can be described by the equation:
The temperature can reach up to some 300 °С. Planned and performed by Marina Stojanovska, Miha Bukleski and Vladimir Petruševski, Department of Chemistry, FNSM, Ss. Cyril and Methodius University, Skopje, Macedonia.Română: Demonstrație a stingerii varului ca reacție puternic exoenergetică. La bucățile de var nestins se adaugă picături de apă. După o vreme, are loc o reacție cu un pronunțat caracter exoenergetic („stingerea varului”) ce poate fi descrisă prin ecuația:
Temperatura poate ajunge până la 300 °С. Planificat și efectuat de Marina Stojanovska, Miha Bukleski și Vladimir Petruševski, Catedra de Chimie, FNSM, Universitatea Sfinții Chiril și Metodiu, Skopje, Macedonia.Polski: Demonstracja gaszenia wapna palonego jako reakcji silnie egzotermicznej. Do kawałków wapna palonego dodawane są krople wody. Po chwili rozpoczyna się wyraźna reakcja egzotermiczna („gaszenie wapna”), którą można opisać równaniem:
Čeština: Pokus, demonstrující hašení páleného vápna jako příklad silně exotermmí reakce. Kapky vody jsou přidávány k pevnému oxidu vápenatému a po chvíli nastává chemická reakce, vyjádřená rovnicí: CaO + H2O ⟶ Ca(OH)2. Teplota přitom může dosáhnout až hodnoty 300 °С. |
Date | |
Source | Own work |
Author | Petrovskyz |
This video was taken during Wikiexperiments 2016 set up by Shared Knowledge.
You can see all videos in category Chemistry Wikiexperiments. العربية | English | македонски | русский | +/− |
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This file was selected as the media of the day for 30 October 2019. It was captioned as follows:
English: A demonstration of slaking of quicklime as a strongly exothermic reaction. Drops of water are added to pieces of quicklime. After a while, a pronounced exothermic reaction occurs ('slaking of lime') that can be described by the equation:
CaO(s) ➕ H2O(l) ⟶ Ca(OH)2(s). The temperature can reach up to some 300 °С. Other languages
Čeština: Pokus, demonstrující hašení páleného vápna jako příklad silně exotermmí reakce. Kapky vody jsou přidávány k pevnénu oxidu vápenatému a po chvíli nastává chemická reakce, vyjádřená rovnicí: CaO ➕ H2O ⟶ Ca(OH)2. Teplota přitom může dosáhnout až hodnoty 300 °С. English: A demonstration of slaking of quicklime as a strongly exothermic reaction. Drops of water are added to pieces of quicklime. After a while, a pronounced exothermic reaction occurs ('slaking of lime') that can be described by the equation: CaO(s) ➕ H2O(l) ⟶ Ca(OH)2(s). The temperature can reach up to some 300 °С. Polski: Demonstracja gaszenia wapna palonego jako reakcji silnie egzotermicznej. Do kawałków wapna palonego dodawane są krople wody. Po chwili rozpoczyna się wyraźna reakcja egzotermiczna („gaszenie wapna”), którą można opisać równaniem:
CaO(s) ➕ H2O(l) ⟶ Ca(OH)2(s). Temperatura może dochodzić do około 300 °С. |
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