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Heat (Thermodynamics) Science Fair Project

Exploring Gas Expansion

Exploring Gas Expansion | Science Fair Projects | STEM Projects
We're going to investigate how different gases expand when heated. We'll use balloons filled with different gases and measure the volume of each gas at different temperatures.


The hypothesis is that helium at 60°C or lower will have more volume than any of the other gases at the same temperature or lower.

Method & Materials

You will fill 10 Mylar balloons with different gases, attach them to a bucket, and submerge them in water at different temperatures. You will measure the volume of each gas and record the data.
You will need a bucket, fishing line, a graduated cylinder, a beaker, a thermometer, 10 Mylar balloons, a cap, an S-hook, silicone, a pipe, eye bolts, and a piece of tubing.


The results indicate that as the temperature of any gas was increased, the volume would also increase. Oxygen had an overall percentage volume change of 36.5%, nitrogen changed 21.8%, argon had a 20.5% change, helium had a 16.4% change, and carbon dioxide changed 15.3%.

Why do this project?

This science project is interesting because it shows how different gases expand when heated, which can be useful for understanding how to use different gases in balloons.

Also Consider

Experiment variations to consider include using a different size balloon and adding something to the water like salt.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related video

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