4
$\begingroup$

In most sites I find online, I see that the Gibbs free energy of adsorption is negative. But, it is also said that physisorption is a reversible adsorption, suggesting that $\delta G=0$ which contradicts the original premise.

Hence, what exactly is the correct free energy change associated with physisorption?

From comments I learn that the reversibility is not used in the conventional thermodynamics sense but rather in the chemical reaction sense (refer). But, I don't see how it applies here since physisorption doesn't involve any bond formation.


NCERT chapter claiming the $\delta G = 0$ and reversibility condition

$\endgroup$
1
  • $\begingroup$ Comments are not for extended discussion; this conversation has been moved to chat. $\endgroup$
    – Buck Thorn
    Aug 21, 2021 at 14:46

0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.