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प्रश्न
What is the Freundlich adsorption isotherm? Illustrate it with a graph.
Describe the Freundlich adsorption isotherm.
आलेख
लघु उत्तरीय
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उत्तर
Freundlich adsorption isotherm is an empirical relation between the amount of gas adsorbed per unit mass of adsorbent `(x/m)` and the equilibrium pressure (P) at constant temperature. It is expressed as:
`x/m = kP^(1//n)`,
where (k) and (n) are constants.
When `(x/m)` is plotted against (P), a curved plot is obtained.
A graph of log `x/m` versus log (P) gives a straight line, indicating the relationship.
This is used to describe adsorption at low pressures and helps find constants (k) and (n).
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