Fireproof banknote

Contrarily water is heated up, with some being evaporated as it absorbs energy from the combustion of alcohol.

[2] CnH2n+1OH(aq) + (3n/2) O2(g) → n CO2(g) + (n+1) H2O(g)[1][2] Common alcohol fuels for this experiment can be methanol (n=1),[2] ethanol (n=2)[1] and both isomers of propanol (n=3).

[1][3] For safety purpose, a water tray should be prepared for emergency use in case a paper banknote caught a fire, and flammable and combustible materials should not be kept or put near the flame.

[1] Euro banknotes are recommended since it is made of paper and it is legally permitted to artistically mutilate it or burn in small amounts.

[7] In contrast to the subsection above, this can be done in a glassware without any absorbing materials like banknotes, towels, or paper.