Q1 )

3. Consider the following chain-reaction mechaniom for the high-temperature formation of nitric oxide, Le, the extended 7eldovich mechanism: (35 pts) O+N2KUNO+NN+O2U4NO+ON+OHNUNO+N With the assumption of equitbriam concentrations of O.O.N2,H, and OH applied to this three-step miechanism, find expresudons for A. The steady-state N-atom coocentration, neglacting reverse reactions: B. The No formation rate diNOJ/ / dt, again neglerting reverse reactions. C. For the condibont piren telow and axine the assumpeions of purt B, how locag does it take on form 70 pren (misle fratien -105) of NO) T=1600Kandp=6.17kginandMWW=28.8kgkmolXine4.5104(molefration)Xen=1ti2s10T(miclefraction) 4. C.thy is burned in an engine with a fuel-rich air fuel ratio. Dry analysis of the exhaust gives the following volume percents: CO2=19%,CO=1%,O2=2%, with the rest being N2. (a) Write the balanced chemical equation for one mole of this fuel at these conditions. (b) Calculate actual Air-fucl ratio. (25 pts)