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Why is adsorption always exothermic ?...

Why is adsorption always exothermic ?

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Adsorption causes a decreases in the surfacce energy of the adsorbed, Therefore adsorption is always exothermic.
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Adsorption is aways exothermic.

Why adsorption is exothermic ?

Knowledge Check

  • The correct statement(s) pertaining to the adsorption of a gas on a solid surface is(are) (i) adsorption is always exothermic (ii) physisorption may transform into chemsisorption transform into chemisorption at high temperature (iii) physisorption increases with increasing temperature but chemisorption decreases with increasing temperature . (iv) chemisorption is more exothermic than physisorption , however it is very slow due to higher energy of activation.

    A
    (i) and (iv) only
    B
    (ii) and (iii) only
    C
    (i),(ii) and (iv) only
    D
    All of these.

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

    A
    (a) `S` is correct but `E` is wrong
    B
    (b) `S` is wrong but `E` is correct
    C
    (c ) Both `S` and `E` are correct and `E` is correct explanation of `S`
    D
    (d) Both `S` and `E` are correct but `E` is not correct explanation of `S`.

  • 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

    A
    `(i),(ii),(iii),(iv)`
    B
    `(ii),(iii),(iv)`
    C
    `(i),(iii)`
    D
    `(ii),(iv)`

    • Similar Questions

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    Adsorption is always exothermic in nature , Do tor agree ?

    Is adsorption an exothermic or endothermic phenomenon ?

    Adsorption is always

    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

    Assertion :- The graphical representation of physical adsorption with temp is Reason :- This is weak adsorption & adsorption is exothermic process.

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