Physisorption
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Physisorption<ref>IUPAC Gold Book definition of physical adsorption</ref> or physical adsorption is a type of adsorption in which the adsorbate adheres to the surface only through Van der Waals force (weak intermolecular) interactions, the same that are resnponsable for the imperfection of real gases and the condensation of vapors. It is characterised by:<ref>IUPAC on properties of physisorption</ref>
- Low temperature, always under the critical temperature of the adsorbate
- Type of interaction: Intermolecular forces (van der Waals forces)
- Low enthalpy: ΔH < 20 KJ/mol
- Adsorption takes place in multilayers
- Low activation energy
[edit] Examples
N2 on iron at 80 K
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[edit] See also
[edit] Notes and References
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