Carbon dioxide decomposes at high temperature according to the equation:
2CO₂(g) ⇌ 2CO(g) + O₂(g); Δ H^° = 510 kJ/mol and Δ S^° = 120 J K^-1/mol
The temperature at which the equilibrium constant (K_p^°) becomes 1.0, is

Question

Carbon dioxide decomposes at high temperature according to the equation:

2CO₂(g) ⇌ 2CO(g) + O₂(g); Δ H^° = 510 kJ/mol and Δ S^° = 120 J K^-1/mol

The temperature at which the equilibrium constant (K_p^°) becomes 1.0, is

TestHub · Accepted Answer

K p ° = 1 means Δ G ° = -RTln K = 0 Δ G ° = Δ H ° - TΔ S ° = 0 T = Δ H ° /Δ S ° = 510000/120 = 4250 K This is option (b).

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