eli5 what happens to the hydrogen baloons when released into the sky?

Question

do they reach a time and burst or do they keep floating in spacedo they reach a time and burst or do they keep floating in space?

In: 1

Answer 1

Simply put, due to lower atmospheric pressure, the balloon expands more to more closely match the internal and external pressure. Usually any real balloon will pop at high enough altitude; however, let’s imagine we have a magic unpoppable balloon. At high altitudes, the atmosphere is stratified like a layer cake. The balloon would continue rising until it reached the hydrogen layer, where it would be suspended at the bottom, floating on a sea of helium.