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Explain Freundlich adsorption isotherm. |
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Answer» <P> Solution :At a given temperature, the mass of the gas adsorbed by solid adsorbent at VARIOUS pressure is given by an empirical solution known as Freundlich equation :`x/m=kp^(1//n)` where .r. is amount (mass) of gas adsorbed by m GRAM of the solid adsorbent at pressure (P), k and .n. are constants at a given temperature for a gas and solid adsorbent. (n is `gt` 1). The graph can be sub-divided into three parts (i) At lower temperature , `(x)/(m)prop^(1)` ( straight LINE ) (ii) At higher pressure , `(x)/(m) prop^(0)` ( independent) (iii) At intermediate pressure , `(x)/(m) prop p^(1/n)` ( curve ) , `(x)/(m)=kP^(1//n)` (curve), (`(1)/(n)` is FRACTIONAL power ) 
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