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Adsorption is aways exothermic....

Adsorption is aways exothermic.

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When a gas is adsorbed on the surface of a solide, its entropy decreases, `i.e., DeltaS` is `-ve`. Now `DeltaS=DeltaH-TDeltaS` and for the process to be spontaneous, free energy change, `DeltaG`, must be negative. As `TDeltaS` is `-ve` , therefore, `DeltaG` can be `-ve` only if `DeltaH` is `-ve`. Hence, adsorption is always exothermic.
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Adsorption is always exothermic in nature , Do tor agree ?

The correct statements pertaining to the adsorption of a gas on a solid surface are (i) Adsorption is always exothermic (ii) Physisorption may transform into chemisorption at high temperature (iii) Physisorption increases with increasing temperature but chemisorotion decrease with increasing temperature (iv) Chemisorption is more exothermic than physisoption, however, it is very slow due to higher energy of activation

Select the set having correct statements pertaining to the adsorption of a gas on a solid surface (1) physisortion may transform into chemisorption at high temperature (2) chemisorption is more exothermic than physisortion , however it is very slow due to higher energy of activation (3) Adsorption is always exothermic (4) Physiosorption increase with increasing temperature but chemisorption decreases with increasing temperature

Statement: A catalyst always lower the energy of ectivation. Explanation: The catalyst-reactant interaction forms activated adsorbed complex and adsorption is always exothermic.

Why is adsorption always exothermic ?

Why is adsorption always exothermic ?

CENGAGE CHEMISTRY-NCERT BASED EXERCISE-NCERT Exercise
  1. What do you understand by activation of adsorption : How is it achiev...

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  2. What role does adsorption play in heterogeneous catalysis ?

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  3. Adsorption is aways exothermic.

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  4. How are the colloidal solutions classified on the the basis of physica...

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  5. Disuss the effect of pressure and temperature on the adsorption of gas...

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  6. What are lyophilic and lyophobic sols?Give one example of each type ? ...

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  7. What is the difference between multimolecular and macromolecular colli...

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  8. What are enzymes ? Write in brief the mechanism of enzyme catalysis ?

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  9. Explain what is observed when ltbr. a. An electrolyte NaCl is added to...

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  10. What are emulsions ? What are their different types ? Give an example ...

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  11. How do emulsifiers stabilise emulsion ? Name two emulsifiers.

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  12. Action of soap is due to emulsification and micelle formation. Comment...

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  13. Give four examples of heterogeneous catalytic reactions.

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  14. What do you mean by activity and selectivity of catalysts ?

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  15. Descirbe some features of catalysis by zeolites.

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  16. What is shape - selective catalysis ?

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  17. Explain the following terms : {:(a. El etropho resis , b. Coagulati...

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  18. Give four uses of emulsion.

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  19. What are micelles ? Give an example of a micelle system.

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  20. Explain the following terms with suitable examples : a. alc osol,b....

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