Question

1. Automobiles and trucks pollute the air with NO. At 2000.0°C, Kc for the reaction

N2(g)+O2(g)⇌2NO(g)

At 2000.0°C Kc = 4.100 × 10–4 and ΔH° = 180.6 kJ. What is the value of Kc at 83.00°C?

Answer 1

∆H=-RTln(Kc)

Antiln(Kc) = ∆H/-RT = 180.6/-8.314 x 356 = -0.0610179663