Hydrogen Balloon Explosion - part of our "Berzelius Day" uploading 24 videos in 24 hours. Full video containing this reaction at:
NOTE FROM THE PROFESSOR: The main reaction is quite simple. 2H2 + O2 → 2H2O. However, the balloon is made from rubber, which is a complex molecule containing principally containing carbon and hydrogen. The heat of the hydrogen burning probably sets fire to the rubber generating CO2 and water. The orange colour probably comes from the burning rubber.
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From the School of Chemistry at The University of Nottingham:
Periodic Videos films are by video journalist Brady Haran
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