# What happens to a balloon in the cold?

## What happens to a balloon in the cold?

Cold air doesn’t cause latex helium-filled balloons to deflate, but it does make helium molecules lose energy and move closer together. This decreases the volume inside the balloon and makes the shell of the balloon shrink and sink to the ground.

What will happen to the size of the balloon when cooled?

The frozen balloon shrank because the average kinetic energy of the gas molecules in a balloon decreases when the temperature decreases. This makes the molecules move more slowly and have less frequent and weaker collisions with the inside wall of the balloon, which causes the balloon to shrink a little.

How does temperature affect the pressure of a balloon?

Boyle’s Law states that if the temperature remains the same and the pressure changes, the volume of the gas in the balloons will decrease as pressure is increased and will increase as pressure is decreased. Gay-Lussac’s Law states that the pressure is directly proportional to the Kelvin temperature.

### How does the balloon shape change?

The shape and size of balloon changes when filled with air or water because these both substances are compressible and can be compressed that is the reason of change in shape and size of a balloon.

How does the temperature inside the balloon compared to the temperature outside the balloon decrease the average density of the whole balloon and make it fly?

The density of the hot air trapped inside the balloon is indeed lower than the density of the air outside the balloon. Since density tells you the mass of the gas, which is presumed constant, per unit of volume, an increasing volume will result in a decreasing density.

How can you tell the altitude of a hot air balloon?

You can use trigonometry functions to determine the altitude of a balloon. Cindy and Mindy, standing a mile apart, spot a hot-air balloon directly above a particular point on the ground somewhere between them. The angle of elevation from Cindy to the balloon is 60 degrees; the angle of elevation from Mindy to the balloon is 70 degrees.

#### What happens to the balloon when it is really high?

When the balloon is really high, there is less air above the balloon than there was at sea level – so the weight of the air above the balloon is less than at sea level. The outside air pressure is pushing on the balloon less than it was when the balloon was at sea level.

How is the size of a balloon determined?

The maximum size is determined by the manufacturer. The size of the balloon is how much helium is in it and the pressure. (pressure inside = pressure outside). The basic equation is the ideal gas law; pV = nRT p = pressure, V = volumn, n = amount, R = constant, T = temperature.

What is the external pressure of a balloon?

At sea level, the external atmospheric pressure of the air is equal to 14.7 lbs/in 2 or 1.0135 bar or 1 atm (those three values are all equal just like 1 yard is equal to 0.9144 meters). Since the balloon’s volume is not changing, we know that the outside pressure on the balloon is balanced by the air pressure of the air inside the balloon.