Which of the following reactions have a positive ΔS_rxn?
A. A(s) + B(g) → C(g)
B. 2 A(g) + B(g) → C(g)
C. 2 A(g) + B(g) → 4 C(g)
D. A(g) + 2 B(g) → C(g)
E. A(g) + B(s) → C(g)

• A. A(s) + B(g) → C(g)
• B. 2 A(g) + B(g) → C(g)
• C. 2 A(g) + B(g) → 4 C(g)
• D. A(g) + 2 B(g) → C(g)
• E. A(g) + B(s) → C(g)

Answer: (C)