In chemistry, we experimented with dry ice. Before starting, we learned about phases of matter and how it changes when the pressure or temperature changes. Like liquid to solid, solid to gas, gas to liquid, and vice versa. Dry ice is solid carbon dioxide and can be melted to become carbon dioxide gas again. For our lab we attempted to answer: "What is going on at a molecular level when dry ice sublimate?"
We first used the dry ice by placing it in water. When placing the dry ice in room temperature liquid, it released the carbon dioxide into the air. Then we added dish soap into the water and this created bubbles filled with carbon dioxide. When we popped the bubbles, the carbon dioxide was released and soap residue was left on our hands and tables. You can see this reaction in the video below.
We also filled a ballon with a 2 cm dry ice cube and waited for the gas to fill the space. Although the dry ice was very little, it still managed to fill our balloon to 18 cm in the end. This means our volume of the balloon was 3053.63 cm3. I also calculated the volume of the dry ice was 33.51 cm3. The ratio is 1:91.12. Meaning that when the carbon dioxide is a solid, like the dry ice, the molecules within are very close together. And when the solid turns into a gas, the molecules grow 91.12 times larger and expand. This was very interesting to learn and helped me understand how and why gases fill the space of the container they are in.