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For each reaction predict if ΔS is positive or negative and briefly state your reason. a) N2(g) + 3 H2(g) → 2 NH3(g) : b) 2 LiOH(aq) + CO2(g) → Li2CO3(aq) + H2O(l) c) H2(g) + Cl2(g) → 2 HCl(g) d) Ba2+(aq) + SO42-(aq) → BaSO4(s)