Barking Dog chemical reaction – part of our “Berzelius Day” uploading 24 videos in 24 hours. Full video containing this reaction at:
NOTE FROM THE PROFESSOR: 4. The basic mixture is carbon disulfide CS2 plus nitrous oxide, N2O. The N2O decomposes and 2N2O → 2N2 + O2. This reaction needs heat to get it going but is then quite violent. The O2 Reacts with CS2 to make a mixture of CO2, SO2 and solid sulfur. Some of the sulfur and SO2 are formed in a so-called excited state (with a big excess of energy) and the energy is lost by emission of blue light.
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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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