Why baloon filled with helium stop flying the next day?

Question

I thought helium is lighter than air. But helium baloon at room temperature of 30 deg.C drops to the ground 24 hours later. What has changed its density?

Answer 1

The material of the balloon (generally latex) allows the helium to leak through its pores over time. This is the classic problem when people fill the balloons the night before a party, only to find them all on the floor the next day.

You can add a sealant to latex balloons prior to filling them so they stay inflated longer. Up to six times longer. The liquid sealant, called "Hi-Float" coats the inside of the balloon helping to reduce the helium leakage.

Foil (a.k.a. mylar) balloons can float for up to two weeks.

Answer 2

the version in density extra or much less explains why the helium balloon rises. in spite of the undeniable fact that it does not answer the priority of the upward push in PE. All which ability is that the balloon has aquired extra means because of the fact it has moved that plenty extra effective from the floor. the two are no longer the same element, and that they do no longer look to be appropriate interior the belief test which you have conceived, which does not propose that this is a adverse thought. in case you have been to place a hollow interior the balloon so as that each and all of the helium might get away into the ambience, what ever substitute into left might rush at a swifter and ever extra effective velocity because of the fact the PE substitute into converted to KE.

Answer 3

I could be wrong...but, I think I recall that helium is so thin that it leaks out of most everything and that it even penetrates through the walls of the ballon. Someone correct me if I'm wrong :-).