English: Solid alcohol – preparing it and burning

- When iso-propanol (or other liquid alcohol) is poured in Dewar vessel containing liquid nitrogen, a dense fog is obtained. The iso-propanol and other lower alcohols tend to evaporate easily. The alcoholic vapors in contact with the liquid nitrogen, condense and a thick fog appears. The alcohol that is poured in the nitrogen containing vessel freezes (freezing point of iso-propanol is –89 °C). The solid alcohol can be ignited and at the beginning it burns with almost colorless flame.

Planned and performed by Marina Stojanovska, Miha Bukleski and Vladimir Petruševski, Department of Chemistry, FNSM, Ss. Cyril and Methodius University, Skopje, Macedonia.