Effusion of carbon dioxide

Carbon dioxide gas effuses through a porous cup, demonstrating the effect of the size and mass of molecules.

A U-tube containing a green liquid is connected with tubing to a stoppered flask. A syringe is attached to the flask and is used to change the pressure on the green liquid in the U-shaped tube.

CO2

Discussion: 

View this and the related gas effusion videos and try to determine what properties of gases affect the pressure.

Credits: 
  • Design and Demonstration
    • Frederick Mattes Hastings College, Hastings, NE 68902
  • Video
    • Jerrold J. Jacobsen University of Wisconsin - Madison, Madison, WI 53706
  • Text
    • Frederick Mattes Hastings College, Hastings, NE 68902
    • Kelly Houston Jetzer University of Wisconsin - Madison, Madison, WI 53706
    • David Phillips Wabash College, Crawfordsville, IN 47933