where does a balloon go after we let it go
If it's filled with helium it will rise until it either reaches a state of equilibrium, in other words the oxygen & helium are exhorting equal pressure which will not last very Iong, or it will POP
To the sky. Then we wish it a happy eternal life in Heaven. But we don't realize that it exploded when the atmospheric pressure was too much for it to bear.
It explodes when it gets too high...
It goes where the wind blows.