Barking dog reaction
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The barking dog reaction is an exothermic chemical reaction that results from the ignition of a mixture of carbon disulfide and nitrous oxide in a cylindrical tube, like a graduated cylinder.[1] When ignited, the reaction produces a bright flash and a loud "woof"-like sound, reminiscent of a barking dog.
Mechanism
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
The length of the tube causes the sound of the reaction.
Video demonstrations
- Barking Dog (slow motion) - Periodic Table of Videos, University of Nottingham
- ScienceBob
- Thoisoi2 - Chemical Experiments!
- NileRed Shorts
- Elementary Productions: Small scale Barking Dog reaction @ youtube
- EXPLOSIVE Barking Dog Reaction! Cryogenic Gases Explosion! (ChemicalForce)
- featured in Making laughing gas (NileRed)
