Ozone (O₃) in the atmosphere can react with nitric oxide (NO) as follows. O₃(g) + NO(g) → NO₂(g) + O₂(g). ΔH°_rxn = -199 kJ/mol, ΔS°_rxn = -4.1 J/K • mol What is ΔG°_rxn for this reaction at 25°C? A) 1020 kJ/mol B) -1.22 × 10³ kJ/mol C) 2.00 × 10³ kJ/mol D) -1.42 × 10³ kJ/mol E) -198 kJ/mol

Question

Quizplus · Accepted Answer

ΔG° = ΔH° - TΔS°. At 25°C (298 K), ΔG° = -199 kJ/mol - (298 K)(-4.1 J/K•mol × 1 kJ/1000 J) = -199 kJ/mol + 1.22 kJ/mol = -198 kJ/mol.

Ozone (O3) in the Atmosphere Can React with Nitric Oxide

Ozone (O₃) in the Atmosphere Can React with Nitric Oxide