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Register Number SATHYABAMA UNIVERSITY (Established under section 3 of UGC Act,1956) Course & Branch :B.Tech - P-CHEM Title of the Paper :Chemical Reaction Engineering – I Max. Marks :80 Sub. Code :619PT403 Time : 3 Hours Date :03/05/2011 Session :AN ______________________________________________________________________________________________________________________ 1. PART - A (10 x 2 = 20) Answer ALL the Questions What are Elementary and Non-Elementary Reactions? 2. Define Order and Molecularity of reaction. 3. Define Space time. 4. Define Semi – Batch reactor. 5. What are the conclusions obtained from comparison chart for performance of single mixed flow and Plug flow reactor for nth order reaction? 6. How will you arrange the following Plug flow, small Mixed and large Mixed flow reactors for order n<1? 7. Define Over all fractional yield. 8. Define Selectivity for multiple reactions. 9. Define Optimum Temperature Progression. 10. Define Heat of Reaction. PART – B Answer All the Questions (5 x 12 = 60) 11. Explain the Integral method and differential method for analyzing kinetic data. (or) 12. Explain in detail about : (a) Arrhenius law (b) Transition state theory. 13. Derive the performance equation for steady – State ideal Plug flow reactor. (or) 14. The elementary liquid – Phase reaction A+2BR with rate 1 2 equation, -rA = rB (12.5 liter2/mol2.min) CAC2B – (1.5min-1) mol CR, is to take place in a 6 liter steady state mixed flow liter. min reactor. Two feed streams, one containing 2.8 mol A/liter and the other containing 1.6 mol B/liter, are to be introduced at equal volumetric flow rates into the reactor, and 75% conversion of limiting component is desired. What should be the flow rate of each stream? Assume a constant density through out. Take K1 = forward reaction rate constant and K2 = reverse reaction rate constant. 15. Describe the behavior of series of “N” number of equal – Size mixed flow reactors for first order reactions. (or) 16. Explain the graphical procedure for finding the outlet composition from a series of mixed flow reactors of various sizes for reactions with negligible density change. 17. Explain the concept of Instantaneous fractional yield and Over all fractional yield for parallel reactions taking place in plug flow reactor and mixed flow reactor. (or) K1 K2 18. For the reaction in series, A R S derive an expression for maximum concentration of ‘R’ and time needed to reach maximum concentration. 19. Describe the effect of temperature on equilibrium conversion as predicted by Thermodynamics (Pressure fixed). (or) 20. Derive an expression for conversion in adiabatic plug flow reactor.