Solution: Predict the sign of the entropy change of the system for each of the following reactions.(a) N2 (g) + 3H2 (g)  →  2NH3 (g) (b) CaCO3(s)  →  CaO(s) + CO2(g) (c) 3C2H2(g)  →  C6H6(g) (d) Al2O3(

Predict the sign of the entropy change of the system for each of the following reactions.
(a) N₂ (g) + 3H₂ (g)  →  2NH₃ (g)
(b) CaCO₃(s)  →  CaO(s) + CO₂(g)
(c) 3C₂H₂(g)  →  C₆H₆(g)
(d) Al₂O₃(s) + 3H₂ (g)  →  2Al(s) + 3H₂O(g)