0
$\begingroup$

Why doesn't the process of chemisorption form multimolecular layers whereas he physisorption with lesser force of attraction between molecules form multimolecular layer?

$\endgroup$

closed as off-topic by Buttonwood, Mithoron, Todd Minehardt, airhuff, Tyberius May 20 at 15:27

This question appears to be off-topic. The users who voted to close gave this specific reason:

If this question can be reworded to fit the rules in the help center, please edit the question.

  • 3
    $\begingroup$ Welcome to Chemistry.SE! What are your thoughts on the question? Please include them as well. $\endgroup$ – William R. Ebenezer May 18 at 4:36
1
$\begingroup$

Chemisorption involves chemical attachment (electrostatic or covalent bonding) with the surface. Since there are a finite number of such bonding sites on the surface, the maximum occupancy is one monolayer.

Physisorption involves weaker (dipolar or dispersion) interactions, and additional layers might be able to attach to underlying layers via similar weak interactions.

It should not be assumed that additional layers cannot form following chemisorption, simply that these would not be associated by the same mechanism, rather through weaker interactions (physisorption). Such interactions are often termed "nonspecific" and preparation protocols may call for treating a surface to remove molecules associated that way.

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.