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How Does Temperature Affect Balloons Circumference

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How Does Temperature Affect Balloons Circumference

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If the balloon is in a cold place its circumference would increase and at room temperature the balloon would stay around the same or decrease in circumference. In a warm place the balloon would expand and its circumference would increase.

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Latex balloons

Marker

Thermometer

Cloth tape measure with millimeter (mm) markings

Clock

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My hypothesis was that if the balloon is in a cold place its circumference would increase and at room temperature the balloon would stay around the same or decrease in circumference. The purpose of this experiment was to see how the helium in balloons reacted to cold and warm temperatures. In a warm place the balloon would expand and its circumference would increase. It was supported by the result I got for the experiment. I noticed that if the volume of the balloon is increasing the circumference also increases. If the volume decreases the circumference also decreases. The balloon's circumference also gained and decreased basically around the same amount. The average circumference cubed also matched up with the rest of the results and the information I got from my research. Hotter air increases kinetic energy of the particle and this causes the gas to expand and when it is cold, molecules lose energy, slow down and move closer together to conserve heat. This decreases the volume and circumference. This makes sense, but a limitation that could have caused me to get incorrect results is that I had to put 1 balloon at a time in the freezer since it couldn’t hold more than 1 and I put a balloon in the freezer for a few minutes longer than the other balloons by accident. I feel like there can’t be many mistakes in this experiment other than human error because all balloons would react the same way depending on the temperature.

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1. Blow up one of the balloons until it is quite full, but not close to popping, and tie it off.
2. Mark the balloon with the number 1
3. Measure the circumference of this first balloon with the cloth tape measure, selecting the fullest part of the balloon to measure, and record this starting circumference in millimeters (mm) in the data table
4. Blow up the second balloon so it looks about the size of the first balloon, but do not tie it off yet. Pinch the opening closed between your thumb and finger so the air can not escape. Measure the circumference of the second balloon, just as you measured the first balloon. Adjust the air in the second balloon until its circumference is within 0.5 cm of the starting circumference of the first balloon
5. Tie off the second balloon and mark it with the number 2. Record the balloon's circumference in your data table.
6. Repeat step 4 for the third balloon, adjusting the circumference until it is within 0.5 cm of the starting circumference of the first balloon, then tying it off, marking it with the number 3, and recording its circumference in your data table.
7. Testing the Balloons at Room Temperature, Cold Area, and in a Hot Area. Measure the temperature with the thermometer of the hot, cold, and room temperatures and record  measurements in the data table.
8. Measure the circumference of each balloon with the tape measure, selecting the fullest part of each balloon to measure and record them on the table as well.
9. Measure average circumference and also the average circumference cubed and record it.