Which one of the following characteristics is
associated with adsorption ?
(1) ``\triangle``G is negative but ``\triangle``H and ``\triangle``S are positive
(2) ``\triangle``G, ``\triangle``H and ``\triangle``S all are negative
(3) ``\triangle``G and ``\triangle``H are negative but ``\triangle``S is positive
(4) ``\triangle``G and ``\triangle``S are negative but ``\triangle``H is positive