File:09. Гасење вар како силно егзотермен процес.webm

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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:
CaO(s) + H2O(l) = Ca(OH)2(s).

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:
CaO(s) + H2O(l) = Ca(OH)2(s).

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:
CaO(s) + H2O(l) = Ca(OH)2(s).

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:
CaO(s) + H2O(l) = Ca(OH)2(s).
Temperatura może dochodzić do około 300 °С.
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.
Date
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Author Petrovskyz

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Media of the day 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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