Which of the following statement is correct for the spontaneous adsorption of a gas?A. `DeltaS` is negative and therefore, `DeltaH` should be highly positiveB. `DeltaS` is negative and therefore, `DeltaH` should be highly negativeC. `DeltaS` is positive and therefore, `DeltaH` should be negativeD. `DeltaS` is positive and therefore, `DeltaH` should also be highly positive

Which of the following statement is correct for the spontaneous adsorp

1.	Which of the following statement is correct for the spontaneous adsorption of a gas?A. `DeltaS` is negative and therefore, `DeltaH` should be highly positiveB. `DeltaS` is negative and therefore, `DeltaH` should be highly negativeC. `DeltaS` is positive and therefore, `DeltaH` should be negativeD. `DeltaS` is positive and therefore, `DeltaH` should also be highly positive
Answer» Correct Answer - B `DeltaS` (change in entropy) and `DeltaH` (change in enthalpy) are related by the equation `DeltaG=DeltaH-TDeltaS` (here, `DeltaG`=change in Gibbs free energy) for adsorption of a gas, `DeltaS` is negative because randomness decreases. Thus, in order to make `DeltaG` negative (for spontaneous reaction), `DeltaH` must be highly negative.

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