What will the sign on delta S be for the following reaction and why?2 MgO (s) -> 2 Mg (s) +O2(g)Positive, because there are more moles of gas on the product side than the reactant side, it is a gas-evolving reaction.Negative, because there are more moles of product than reactant.Negative, because there are more moles of gas on the reactant side than the product side.Not sure, more information needed