CBSE Class 12 Chemistry Notes: Surface Chemistry – Frendich Adsorption Isotherm

Frendich Adsorption Isotherm:-

• The extent of the adsorption at a given surface is generally increases with increase in pressure and concentration at constat temperature.
  – the extent of adsorption is thus expressed as x/m where m is mass of the adsorbent, x is the mas of  adsorbate when adsorption equilibrium is reached.
  

Limitation of freundlich adsorption Iso therm:-

• The experimental values, when plotted for given isotherm, show some deviation from linearity specially at high pressures.
• Hence the relation is considered as an approximate one and holds good over a limited range of pressure.

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