We have really great friends. Some of them are that kind of friends that call you and say:”Hi, I just got hold of 20 kilo of dry ice, wan’t me to come by and make some experiments?”
“Sure we do! Let’s have fun and explode the childrens Swimming Pool at the same time!” We said.
The children learned about cold temperatures and the power of dry ice. It is just as dangerous as hot things.
What happens is that the dry ice melts and turns into CO₂ gas. The gas takes up more space than the ice did, and the pressure in the bottle increases. As the lid of the bottle isn’t strong enough to hold such hig pressure, it is shut of the bottle like a bullet.