Question

One of the reactions that occurs within a catalytic converter in the exhaust pipe of a car is the simultaneous oxidation of carbon monoxide and reduction of NO (both of which are harmful pollutants): 2CO(g)+2NO(g)→2CO2(g)+N2(g) Standard thermodynamic quantities for selected substances at 25∘C Substance ΔG∘f(kJ/mol) O2(g) 0 O3(g) +163.2 CO(g) − 137.2 CO2(g) − 394.4 N2(g) 0 NO(g) +87.6 NO2(g) +51.3 You may want to reference (Pages 714 - 719) Section 17.7 while completing this problem. Figure of 0 Part B Complete previous part(s)

Part A Part complete Use standard free energies of formation to determine ΔG∘rxn for this reaction at 25∘C . Express the free energy change to four significant figures and include the appropriate units. -- ΔG∘rxn Δ G r x n ∘ = Value

Answer 1