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Get Answers to all your Questions
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- #Surface Chemistry
Which one of the following characteristics is associated with adsorption?
- Option 1)
is negative but
and
are positive
- Option 2)
are all negative
- Option 3)
- Option 4)
Answers (1)
As learnt in
Change in Q during adsorption -
Q=
H - T
S
- wherein
Q can be negative if
H is sufficiently high negative value as -T
S is positive. In an adsorption process which is spontaneous, a combination of these two factors make
G negative.
As the molecule of the adsorbate are held on the surface of the solid assorbent, Entropy decreases i.e
As
For absorption to occur, and it is possible only when
Option 1)
is negative but
and
are positive
This is incorrect option
Option 2)
are all negative
This is correct option
Option 3)
and
are negative but
is positive
This is incorrect option
Option 4)
and
are negative but
is positive
This is incorrect option
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