(a) In a chemical reaction two water-soluble ionic substances react to form an insoluble solid precipitate in a metathesis reaction. Would you expect DS to be positive, negative, or close to zero for this reaction?
Delta S for this reaction should (postive, negative, or zero)?
(b) In which of the processes described below should the entropy increase? Choose all of the correct possibilities.
-ice cubes melting at -5 oC and 1 atm pressure
-perfume from a bottle evaporates and spreads throughout a room
-formation of CH4(g) and O2(g) molecules from CO2(g) and H2O(l) at room temperature and 1 atm pressure
-the reaction of sodium metal with chlorine gas to form solid sodium chloride
-some dry ice left on a tabletop disappearing via sublimation