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As altitude increases external pressure exerted on the balloon slowly drops while the internal balloon pressure remains constant. The temperature also greatly decreases to well below freezing making the mylar quit brittle. If the balloon is filled to capacity with helium or hydrogen it will eventually burst due to pressure changes at about 2000 - 4000 meters in altitude. If filled to 50% capacity it will burst below 10000m due to low temperature fracturing.
The balloon will rise up, and its altitude will eventual stabilize at the height where the density of the air is equal to its own density. I'm not sure what sort of height such a balloon might attain, but it won't be reaching the edge of space or anything like that: probably just a few hundred feet; possibly a few thousand. Although mylar is pretty impermeable, the helium will leak out by degrees, and so the density of the balloon will increase. No longer buoyant, it will descend and finally land in some lonely spot: a miserable, dejected, deflated mylar rag. It will eventually be discovered by some hiker, who will be immensely disappointed if it doesn't have a message attached to it.
What else can I help you with?
Why do helium balloons float better than just air balloons?
helium is less dense than air. :) so helium will float better than air
Is helium suitable for blowing up balloons?
Yes, balloons filled with helium will be buoyant in air
Helium balloons vs carbon dioxide?
Helium balloons deflate faster because the molecules are smaller and can seep through the smallest of holes. ... Except that this isn't what happens. Try inflating some latex balloons with CO2 (use a chemical reaction with baking soda to generate it) and compare them to helium balloons. It's amazing to see how quickly the CO2 balloons shrivel up. Note: balloons made of mylar or other materials might behave more in line with theory, but CO2 escapes from latex balloons quickly.
When balloons are filled with this they are lighter than air?
Hot air, hydrogen or helium are lighter than cold air.
What element is used more in making balloons?
Helium is a gas used to inflate lighter than air balloons.
Why do helium balloons float better than just air balloons?
helium is less dense than air. :) so helium will float better than air
How do helium balloons float in the air?
Helium balloons float in the air because helium is lighter than the surrounding air. This causes the balloon to be buoyant and rise upwards.
Is helium suitable for blowing up balloons?
Yes, balloons filled with helium will be buoyant in air
What gases are in balloons?
air and helium
What air is inside balloons?
helium
When balloons are filled with this they are lighter than air?
Hot air, hydrogen or helium are lighter than cold air.
Why do helium-filled balloons float up in the air?
Helium is lighter than air.
Why will helium filled balloons float in the air?
Because helium is lighter than air.
Helium balloons vs carbon dioxide?
Helium balloons deflate faster because the molecules are smaller and can seep through the smallest of holes. ... Except that this isn't what happens. Try inflating some latex balloons with CO2 (use a chemical reaction with baking soda to generate it) and compare them to helium balloons. It's amazing to see how quickly the CO2 balloons shrivel up. Note: balloons made of mylar or other materials might behave more in line with theory, but CO2 escapes from latex balloons quickly.
Is helium only used in balloons and air ships?
Helium is the most used gas for balloons; sometimes hot air and rarely hydrogen.
Why do helium filled balloons float upwards but air filled balloons drop down?
bcoz helium is lighter than air
Why does a helium balloom float in air?
Helium is lighter than air. so balloons filled with helium will float in air
