ΔS is positive for the reaction _________________.
a. 2NO(g) + O 2(g) → 2NO2(g)
b. 2N2(g) + 2H2(g) → 2NH3(g)
c. C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)
d. Mg(s) + Cl2(g) → MgCl2(s)
e. C2H4(g) + H2(g) → C2H6(g)
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