Chemical Kinetics

 

 12) (a) C2H4(g) + 3O2(g) 2CO2(g) + 2H2O(g)

 

             Rate = -Δ[C2H4]/Δt = 0.23 M/s

             Rate = -Δ[C2H4]/Δt = 1/2 Δ[CO2]/Δt = 0.23 M/s

             Rate = Δ[CO2]/Δt = 2 x 0.23 M/s = 0.46 M/s

 

             Rate = -Δ[C2H4]/Δt = 1/2 Δ[H2O]/Δt = 0.23 M/s

             Rate = Δ[H2O]/Δt = 2 x 0.23 M/s = 0.46 M/s

             

       (b) N2H4(g) + H2(g) 2NH3(g)

 

             Rate = -ΔPN2H4/Δt = 45 torr/hr

             Rate = -ΔPN2H4/Δt = 1/2 ΔPNH3/Δt = 45 torr/hr

             Rate = ΔPNH3/Δt = 2 x 45 torr/hr = 90 torr/hr

 

             Rate = -ΔPN2H4/Δt = -ΔPH2/Δt = -45 torr/hr

             ΔPT/Δt = 90 torr/hr - 45 torr/hr - 45 torr/hr = 0 torr/hr