Balloon in a bottle: 03/11.2021

 In this lab my classmates and I were able to get a better understanding of pressure and volume according to Charles law. My partner and I were able observe pressure and volume changes within a closed system. Listed below are the materials used. 

Materials:

250 ml Flask                     

Hotplate

Balloon                              

Ice

Shallow foil pan

Lab: First my partner and I filled a 250ml flask with about 125ml of water and attached a balloon to the top. Once this was complete we brought the water to a boil. As the temperature increased the volume of the balloon began to double which followed Charles law. As the water began to transform into a gas the molecules filled the balloon causing it to inflate, and eventually pop. Next we created an ice water bath. Following this we placed a new balloon on top of the flask, and placed it in the pan. After a few moments the balloon fell into the flask and began to expand. This was caused by the slowing of water molecules causing the pressure inside the flask to decrease. At this point the atmospheric pressure outside of the flask was greater than the inside. To balance the pressure air molecules pushed down on the balloon, causing it to fall inside of the flask and inflate it. The photos below are from this lab. 

These photos demonstrate the particles inside and outside the flask. 

When flask was heated: 

When flask was cooled: