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Which of the following is true during ad...

Which of the following is true during adsorption?
a. `DeltaG` , `DeltaH` , and `DeltaS` all are negative.
b. `DeltaG` is negative, but `DeltaH` and `DeltaS` is positive.
c. `DeltaG` and `DeltaH` are negative, but `DeltaS` is positive.
d. `DeltaG` and `DeltaS` are negative, but `DeltaH` is positive.

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