Barking dog reaction
Video of a barking dog reaction by Maxim Bilovitskiy.
The "Barking Dog" is an exothermic chemical reaction that results from the ignition of a mixture of carbon disulfide and nitrous oxide.[1]
It has been known for centuries; in 1853, Justus von Liebig was using the bright blue flash and the distinctive ‘woof’ sound of the demonstration to enthrall his students.
In simple terms, the ‘Barking Dog’ reaction is a combustion process, in which a fuel (carbon disulfide, CS2) reacts with an oxidizing agent (nitrous oxide, N2O), producing heat and elemental sulfur. The flame front in the reaction is a zone of very hot, luminous gas, produced by the reactants decomposing.
8 N2O + 4 CS2 → S8 + 4 CO2 + 8 N2
References
- ↑ Taming the Barking Dog Seabourne, Ché Royce; Maxwell, George; Wallace, James. J. Chem. Educ. 2006 83 751. Link
External links
- Barking Dog (slow motion) - Periodic Table of Videos, University of Nottingham
- University of Leeds Barking Dog site
- Page linking to a recorded lecture on the reaction
- Elementary Productions: Small scale Barking Dog reaction @ youtube
- Barking Dog Reaction How to Do the Barking Dog Chemistry Demonstration
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