Question

Take a few drops of spirit in two petri dishes separately. Keep one of the dishes under a ceiling fan and switch on the fan. Keep another dish with its lid closed. What do you notice? What could be the reason for this change?

Answer 1

1) The spirit in the dish which is kept under the ceiling fan disappears. 

2) Whereas we will find some spirit left in the dish that is kept in the lidded dish. 

3) The molecules which are escaping from the surface is high and they can’t reach back to liquid due to wind blow. So, evaporation is high under fan. 

4) At the same time evaporation is less in the dish which is closed by lid.