NEET2014ChemistrySurface ChemistryActual
Which of the following statements is correct for the spontaneous adsorption of a gas?
Options
- A∆ S is negative and therefore, ∆ H should be highly positive
- B∆ S is negative and therefore, ∆ H should be highly negative
- C∆ S is positive and therefore, ∆ H should be negative
- D∆ S is positive and therefore, ∆ H should also be highly positive
Correct answer
B. ∆ S is negative and therefore, ∆ H should be highly negative
Step-by-step solution
∆ G = ∆ H - T ∆ S ∆ S = - v e for adsorption So, ∆ H must be - v e to make ∆ G = - v e ∆ G = ∆ H - T ∆ S