During the adsorption of a gas on the surface of a solid , which of the following is true ?

Options

A. `Delta G lt 0 , Delta gt 0 , Delta S lt 0`
B. `Delta G gt 0 , DeltaH lt 0 , Delta S lt 0`
C. `Delta G lt 0 , Delta H lt 0 , Delta S lt 0`
D. `Delta G lt 0 , Delta H lt 0 , Delta S gt 0`

Answer

C

Explanation

In an adsorption process , which is spontaneous , `Delta S ` is negative , `Delta H` is negative (exothermic) acid `DeltaG` is also negative.