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Write the Differences Between Physisorption and Chemisorption with Respect to the Following - Chemistry

Write the differences between physisorption and chemisorption with respect to the following: 

(i) Specificity

(ii) Temperature dependence

(iii) Reversibility and

(iv) Enthalpy change

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Solution

 

S. No.

Point of difference

Physiosorption

Chemisorption

(i)

Specificity

This is not specific in nature.

This is highly specific in nature.

(ii)

Temperature dependence

Low temperature is favourable for physiosorption. It decreases with increase in temperature.

High temperature is favourable for chemisorption. It increases with the increase in temperature.

(iii)

Reversibility

This is reversible in nature.

This is irreversible in nature.

(iv)

Enthalpy change

Enthalpy of adsorption is low.

Enthalpy of adsorption is high.

 

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