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Usually, the air pressure inside a balloon is very high because the plastic outer shell of a balloon wants to contract and press the air into a small space. High in the atmosphere, air pressure is much lower than on the ground. When the air pressure outside a balloon is bigger than the air pressure inside, the balloon switches from wanting to push in on the air to the air pushing on the balloon. as this happens to some parts of a balloon and not others, it is uneven and the balloon pops.

Answer:
There are two distinct cases:

  • For child's rubber balloon the air inside is at higher pressure because it is being squeezed by the rubber that wants to return to its original size. Just like you have to apply pressure to a rubber band to keep it stretched.
  • In the case of hot air balloons the pressure on the inside of the balloon is the same as the atmospheric pressure. The balloon in this case is like an upside down bucket of air that would like to rise. It fills the container but shares the pressure of its surroundings.
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Why does a partially inflated balloon expand as it rises?

As the balloon rises, the air pressure outside the balloon decreases while the air pressure inside the balloon stays the same. This causes the balloon to expand because the higher pressure inside the balloon pushes against the lower pressure outside.


How does air escape a balloon?

Air escapes a balloon when the pressure inside the balloon is greater than the pressure outside, causing the air to flow out through the opening of the balloon. This process continues until the pressure inside and outside the balloon equalize.


Is the pressure of a balloon greater on the inside or outside?

The pressure of a balloon is greater on the inside because the gas molecules inside the balloon are constantly colliding with the walls of the balloon, creating the pressure that keeps the balloon inflated.


Why does the pressure outside the balloon decrease as it rises?

The pressure outside the balloon doesn't change when the balloon rises. By a balloon rising, I assume that air is being placed into the balloon. As the balloon fills with air, the pressure inside the balloon will increase. Since the balloon can stretch, the increasing pressure against its inner walls will cause it to rise, or more correctly put, expand. Eventually, the balloon will be stretched to its fullest capacity if more air is placed inside it. When it pops, the bang you hear is the high pressure of the atmosphere inside the balloon equalizing with the lower pressure of the atmosphere outside the balloon.


Why does an inflated balloon inflate inside a bell jar?

An inflated balloon will inflate inside a bell jar because the air pressure outside the balloon is reduced when the bell jar is sealed. This creates a pressure difference between the inside and outside of the balloon, causing the air inside the balloon to expand and inflate it.

Related Questions

Why does a partially inflated balloon expand as it rises?

As the balloon rises, the air pressure outside the balloon decreases while the air pressure inside the balloon stays the same. This causes the balloon to expand because the higher pressure inside the balloon pushes against the lower pressure outside.


How does air escape a balloon?

Air escapes a balloon when the pressure inside the balloon is greater than the pressure outside, causing the air to flow out through the opening of the balloon. This process continues until the pressure inside and outside the balloon equalize.


Is the pressure of a balloon greater on the inside or outside?

The pressure of a balloon is greater on the inside because the gas molecules inside the balloon are constantly colliding with the walls of the balloon, creating the pressure that keeps the balloon inflated.


Why does the pressure outside the balloon decrease as it rises?

The pressure outside the balloon doesn't change when the balloon rises. By a balloon rising, I assume that air is being placed into the balloon. As the balloon fills with air, the pressure inside the balloon will increase. Since the balloon can stretch, the increasing pressure against its inner walls will cause it to rise, or more correctly put, expand. Eventually, the balloon will be stretched to its fullest capacity if more air is placed inside it. When it pops, the bang you hear is the high pressure of the atmosphere inside the balloon equalizing with the lower pressure of the atmosphere outside the balloon.


Why does an inflated balloon inflate inside a bell jar?

An inflated balloon will inflate inside a bell jar because the air pressure outside the balloon is reduced when the bell jar is sealed. This creates a pressure difference between the inside and outside of the balloon, causing the air inside the balloon to expand and inflate it.


As a balloon rises does the presure inside the bag of balloon increases or decreases?

As a balloon rises, the pressure inside the balloon decreases. This is because the atmospheric pressure outside the balloon decreases with altitude, causing the balloon to expand as the pressure inside remains relatively constant.


Why does a balloon collapses when air is removed from it?

A balloon collapses when air is removed from it because the pressure inside the balloon is higher than the pressure outside. As the air is removed, the pressure decreases inside the balloon causing it to shrink.


Why did the inflated balloon move when the air inside it escapes?

When the air inside the balloon escapes, it creates a difference in air pressure between the inside and outside of the balloon. This pressure difference causes the balloon to move in the direction of lower pressure, which is typically outwards.


What happens to the pressure of the air outside of the balloon as it goes higher?

The pressure of the air outside the balloon decreases as it goes higher in altitude because the air becomes less dense at higher altitudes. This decrease in pressure causes the balloon to expand as the air inside the balloon pushes outward.


What has to happen for a balloon to inflate?

A balloon inflates when it is filled with a gas, such as helium or air, creating pressure inside the balloon which causes it to expand. The gas molecules inside the balloon push against the walls, causing it to stretch and increase in size.


How you know gas is inside the balloon?

If there were nothing inside the balloon - a vacuum - the balloon would quickly collapse due to the pressure of the atmosphere outside it. A firmer structure might resist the air pressure, but not a balloon.


What would change the size of a balloon?

Increased pressure on the inside, or decreased pressure on the outside.