We’ve blown up a balloon using a Baking Soda and Vinegar reaction before, but this time we’re going to use a different scientific approach to blow up the balloon.
Use a Bottle to Blow-up a Balloon Video
- 8 inch Balloon
- Empty 2 Liter Bottle
- 2 pans (I used 9inch square pans)
- Enough Ice & Cold Water to Fill one Pan
- Enough Hot Boiling Water to Fill another Pan
Step 1 – Start with an empty two liter bottle and secure a balloon around the mouth of the bottle.
Helpful Tip: 8inch balloons work best for this experiment. When we tried with a 10inch balloon, it didn’t inflate entirely.
Step 2 – Prepare two pans of water. Fill one pan with ice and cold water. Fill the other pan with hot boiling water.
Step 3 – Place the bottle in the pan with the hot water. Hold it in the pan for 30-40 seconds and watch the balloon inflate.
Step 4 – Remove the bottle from the hot water and place on the table for a few seconds. Notice that the balloon stays inflated.
Step 5 – Place the bottle in the pan with the cold water. Hold it in the pan for 30-40 seconds and water the balloon deflate.
Step 6 – Remove the bottle from the cold water and place on the table. The balloon will remain deflated.
How Does the Experiment Work?
Even though the bottle looks empty, it is actually filled with air.
When the bottle is placed into the pan with the hot water, the heat from the water caused the air inside the bottle to also heat up. As the air in the bottle heated up the air molecules began to move faster and take up more space. The air from the bottle them moved into the balloon and caused it to inflate.
When the bottle is removed from the hot water, the balloon stays inflated. This is because the air molecules in the bottle are still hot. If you leave the bottle out of the water for awhile it will eventually cool down and the balloon will deflate.
When the bottle is placed into the pan with the ice cold water, the cold water caused the air inside the bottle to cool down. As the air molecules cool down they began to move slower and take up less space. The air then moved out of the balloon and back into the bottle and caused the balloon to deflate.
More Science Fun
Want to learn more about what air can do? Then check out these other simple and fun experiments:
- Stab a Straw through a Potato – Yes, it really is possible and it’s all because of Air Pressure
- Upside down Water Glass – Turn a glass full of water upside down…without spilling a drop!
- Keep Towel Dry Under Water – Use simple science to keep the paper towel dry after submerging it in water
I hope you enjoyed the experiment. Here’s some printable instructions