[Virginia Tech Department of Physics]

Lecture Demonstrations

Modern Physics
   

Q20: Helium Diffusion

 

Purpose: To demonstrate how quickly helium will diffuse.

Description:
Place a paper bag or a suspended glass jar over the porous jar on the apparatus. Then pumping helium into the paper bag will cause water to flow out the spout because of the increased pressure due to helium diffusion.
Equipment List: Storage Location: CHEMP 130A
  Jar with water, two-hole rubber stopper, glass tube, porous jar, thistle tube Not Currently Available
  Helium  

References:

Manual: None   Setup Notes: Q20 PIRA #:
Manufacturer(s): Other school's Demonstration web pages

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