File:19. Експлозија на смеса од водород и воздух.webm

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Македонски: Експлозија на смеса од водород и воздух. Биконусен сад е претходно наполнет со водород. Водородот се пали и гори, а воздухот навлегува од долниот отвор на садот, образувајќи смеса воздух–водород којашто со текот на времето станува сè побогата со воздух. Како што составот на смесата се приближува кон критичниот, горењето станува нестабилно и создава звук со опаѓачка честота (поради осцилациите на смесата од гасови во садот). Штом критичниот состав е постигнат, експлозијата е неизбежна.
Осмислено и изведено од Марина Стојановска, Миха Буклески и Владимир Петрушевски, Институт за хемија, ПМФ, УКИМ, Скопје.
Deutsch: Explosion eines Wasserstoff-Luft Gemischs. Der Doppelkegelbehälter ist mit Wasserstoff befüllt. Der Wasserstoff wird angezündet, und brennt mit kaum sichtbarer Flamme. Gleichzeitig strömt Luft von unten in den Behälter. Dabei entsteht ein Wasserstoff-Luft Gemisch welches sich langsam mit Luft anreichert. Bei der Annäherung an das kritische Verhältnis wird der Abbrand instabil und produziert Schallwellen mit sinkender Frequenz (durch Oszillationen des sich anreichernden Gemischs). Wenn das kritische Verhältnis erreicht ist, folgt unweigerlich die Explosion.
Entwickelt und ausgeführt durch Marina Stojanovska, Miha Bukleski und Vladimir Petruševski, Fachbereich Chemie, Fakultät Naturwissenschaften und Mathematik, Universität der Hll. Kyrill und Method, Skopje, Mazedonien.
English: Explosion of a hydrogen–air mixture. The bi-conical vessel is filled with hydrogen gas. The hydrogen is ignited and starts to burn, while air enters from the bottom, making an air–hydrogen mixture that is slowly air-enriched. When the critical composition is approached, the burning becomes unstable and produces a sound wave with a decreasing frequency (due to the oscillations of the air-enriching mixture). Once the critical composition is reached, the bang is inevitable.
Planned and performed by Marina Stojanovska, Miha Bukleski and Vladimir Petruševski, Department of Chemistry, FNSM, Ss. Cyril and Methodius University, Skopje, Macedonia.
Română: Explozia unui amestec de hidrogen și aer. Vasul biconic este umplut cu hidrogen gazos. Hidrogenul este aprins și începe să ardă, în timp ce aerul intră prin fundul vasului, creând un amestec de aer și hidrogen care se îmbogățește treptat cu aer. Pe măsură ce se apropie de compoziția critică, arderea devine instabilă și produce o undă sonoră cu frecvență în scădere (datorită oscilațiilor amestecului cu din ce în ce mai mult aer). Când se ajunge la compoziția critică, explozia este inevitabilă.
Planificat și efectuat de Marina Stojanovska, Miha Bukleski and Vladimir Petruševski, Catedra de Chimie, FNSM, Universitatea Sfinții Chiril și Metodiu, Skopje, Macedonia.
Čeština: Exploze směsi vodíku se vzduchem. Nádoba je naplněna vodíkem, po zapálení vodíku do nádoby proniká spodním otvorem vzduch. Po dosažení kritické koncentrace dojde k výbuchu směsi vodíku a kyslíku.
Autoři: Marina Stojanovska, Miha Bukleski and Vladimir Petruševski, Department of Chemistry, FNSM, Ss. Cyril and Methodius University, Skopje, Macedonia.
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