We all know that water boils at 100 Â° C and that, like any other liquid, it stays at the temperature of boiling while there is liquid. The following experiment aims precisely to demonstrate this fact. Let us hope that the striking image of a burning ticket which is not consumed will help us not forget this important property.
We can see how the ticket is moistened in a blend ethanol/water, which contains in addition sodium chloride, which is used to give the flame orange (see testing the flame) because the ethanol flame is barely visible. It is then turned on and burning with an orange flame until it runs outs ethanol. The ticket is not only not burned, but that just heats up, so that you can take it with the hand immediately after consuming the flames.
If you're wondering, Yes, the ticket is 20 euros of truth!
Department of Inorganic Chemistry
Universidad de Alicante Carretera de San Vicente del Raspeig s/n 03690 San Vicente del Raspeig Alicante (Spain)