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Adsorption and Critical Temperature

  • #1
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Homework Statement


An extract form my textbook:
" In general, easily liquefiable gases( ie. with higher critical temperature) are readily adsorbed as van der walls forces are stronger near the critical temperature. Hence 1g of activated charcoal adsorbs more SO2( Tc=630K),than CH4 (Tc=190K) which is still more than 4.5 mL of H2(Tc=33K)."

Homework Equations




The Attempt at a Solution



I'm having trouble understanding what this means.
1) Are we talking about VDW forces between the adsorbate( the gas) and the adsorbant? If so how are they stronger near Tc?
2) Are these gases liquefied and then adsorbed? Is this the general situation for adsorbtion of all gases?
3) What is the conclusion I'm supposed to draw from all this?
Please do help.
 

Answers and Replies

  • #2
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Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 

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