The following systems are initially at equilibrium:
CO₂(g) + C(s) ⇌ 2CO(g)
2C₄H₁₀(g) + 13O₂(g) ⇌ 8CO₂(g) + 10H₂O(g)
2KClO₃(s) ⇌ 2KCl(s) + 3O₂(g)
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