1. The problem statement, all variables and given/known data Predict the sign of ΔS(sys) for each of the following processes: a) Zn(s)+2HCl(aq)-->H2(g)+ZnCl2(aq) b) CH3CH2CH3(g)+5O2(g)-->3CO2(g)+4H2O(l) Also, i'm not sure but when we're evaluating questions like these, do we count the number of moles only of solids, aqueous and gaseous elements and compounds? 2. Relevant equations 3. The attempt at a solution The first one, ΔS is POSITIVE but i'm not sure why though because 3 moles reactants-->2 moles reactant (should be more ordered (negative)...) thanks.