(a) Compare physisorption and chemisorption on the basis of

    (i) specificity, and

    (ii) enthalpy of adsorption.

 (b) Differentiate between adsorption and absorption.

 

 

 
 
 
 
 

Answers (1)

(a) 

Physiorption

  • Not specific
  • Low enthalpy of adsorption

Chemisorption

  • Highly specific
  • high enthalpy of adsorption

 (b) In adsorption, the substance is concentrated only at the surface while in absorption, the substance is uniformly distributed throughout the bulk of the solid

hence, adsorption is a surface phenomenon while absorption is a bulk phenomenon

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