For the reaction, 2Cl(g)`rarr Cl_2(g)` what are the signs of `DeltaH` and `DeltaS`?

Explanation

Since the reaction involves formation of bonds, enery is released. So `DeltaH` is negative. Since chlorine atoms combine together to form `Cl_2` molecules, randomness decreases. i.e. `DeltaS` is negaive.