In this Activity, students investigate physical changes that occur in a candle to learn how a candle functions and how you can blow it out. This Activity is based on a series of lectures presented by Michael Faraday in the 1850s. Candles can help to illustrate numerous chemical principles, including phases of matter, processes of melting and vaporization, gas-phase oxidation/reduction chemistry, complete and incomplete combustion, several modes of transport (capillary action, diffusion, buoyancy), activation energy (a match), and multiple thermodynamic principles.
Robert J. Eierman, J. Chem. Educ. 2008, 85, p528A.