What are the differences between a hydrogen filled balloon and an air filled balloon flying or moving in air?

To understand the differences between a hydrogen-filled balloon and an air-filled balloon, let's first explore the properties of hydrogen and air.

1. Hydrogen-filled Balloon:
- Hydrogen is a highly flammable gas, and when used in balloons, it creates buoyancy.
- Hydrogen gas is lighter than air, making the balloon float.
- To have a hydrogen-filled balloon, you need a source of hydrogen gas and a way to contain it, usually by using a lightweight material such as latex.

2. Air-filled Balloon:
- Air is a mixture of gases, primarily nitrogen (approximately 78%) and oxygen (approximately 21%).
- Since air is composed of various gases, it doesn't have the same buoyancy properties as hydrogen.
- An air-filled balloon is typically made of a lightweight material like latex or rubber, and it stays buoyant due to the difference in density between the air inside and the surrounding air.

Differences between the two types of balloons:
1. Buoyancy: A hydrogen-filled balloon will float because hydrogen is lighter than air. On the other hand, an air-filled balloon will tend to neither float nor sink but might drift due to air currents.
2. Flammability: Hydrogen is highly flammable, which adds a level of risk to using a hydrogen-filled balloon. Air is not flammable, providing a safer alternative.
3. Lifting Capacity: Since hydrogen is lighter than air, a hydrogen-filled balloon can lift more weight compared to an air-filled balloon of the same size. Air-filled balloons have less lifting capacity.

To summarize, the main differences between a hydrogen-filled balloon and an air-filled balloon are in buoyancy, flammability, and lifting capacity. A hydrogen-filled balloon floats due to the lighter-than-air hydrogen gas, while an air-filled balloon's buoyancy is based on the density difference between the air inside and outside the balloon. Additionally, hydrogen-filled balloons pose higher flammability risks, while air-filled balloons are safer. Lastly, due to hydrogen's lighter properties, hydrogen-filled balloons have greater lifting capacity compared to air-filled balloons.