What is the sign of delta H and deltaS whenbromine gas gets adsorbed on charcoal?

Adsorption of gases on charcoal surface gives more orderly arrangement that means randomness decreases. So delta S is negative. As adsorption of gases is spontaneous reaction delta G is negative
That means
$$\begin{gathered} ∆G =∆H -T∆S \\ ∆S = negative and T∆S = Positive \\ ∆G = negative for spon\tan eous reaction \\ So \\ ∆H = negative, that means the reaction is an exothermic reaction. \end{gathered}$$