A) \[\Delta G<0,\Delta S<0,\Delta H<0\]
B) \[\Delta G<0,\Delta S>0,\Delta H<0\]
C) \[\Delta G>0,\Delta S>0,\Delta H>0\]
D) \[\Delta G<0,\Delta S<0,\Delta H>0\]
Correct Answer: A
Solution :
As the molecules of the adsorbate are held on tne surface of adsorbent, entropy decreases. \[As-\Delta G=\Delta H-T\Delta S,\]Hence for the process of adsorption to occur, \[\Delta G\]must be - ve. As \[\Delta S\]is negative, \[\Delta G\]an be negative only if \[\Delta H\]is negative.
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