Summary
Highlights
John from Edwards Vacuum introduces the experiment demonstrating Boyle's Gas Law, which describes the inverse relationship between pressure and volume, using a vacuum pump and marshmallows.
The marshmallows are placed in a bell jar. As the vacuum pump draws air out, the pressure around the marshmallows drops, causing the tiny trapped gas bubbles inside them to expand significantly.
After reaching their full size, the marshmallows slightly decrease in size as some of the internal gas bubbles escape due to the continued low pressure.
The vacuum pump is sealed, and air is let back into the bell jar. The marshmallows are now smaller than their original size because some gas bubbles burst and escaped during the vacuum phase, resulting in less gas inside.
The experiment successfully demonstrates Boyle's Gas Law. A safety reminder to have an adult present when repeating the experiment is given, and it's confirmed that the marshmallows are safe to eat.