AIPMT | 2014Surface ChemistryHard

Question

Which of the following statements is correct for the spontaneous adsorption of a gas?

Options

A.ᐃS is negative and, therefore, ᐃH should be highly positive
B.ᐃS is negative and therefore, ᐃH should be highly negative
C.ᐃS is positive and, therefore, ᐃH should be negative
D.ᐃS is positive and, therefore, ᐃH should also be highly positive

Solution

For adsorption ᐃS = - ve, ᐃH = - ve.

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