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Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth semester B.Tech degree examinations (S) September 2020

Course Code: CH305
Course Name: CHEMICAL REACTION ENGINEERING - I

Max. Marks: 100 Duration: 3 Hours

PARTA
Answer any two full questions, each carries 15 marks.

1 9) Thestoichiometry and kinetics of the fermentation reaction are given by:

‎2८2 + 0.16,‏ قر
−−− − جب
⋀∁∘⊟⊹↥⋀⊤⋅

‎Where (^ is the concentration of reactant and varies in the range 0.5-50 1101/17”. For
very high concentrations of A, determine the reaction order.

‎b) Derive the equation for temperature dependency from transition theory. Compare
different theories for predicting temperature dependency of reaction rate constant.

‎€) At 1100 K n-nonane thermally cracks (breaks down into smaller molecules) 20 times
as rapidly as at 1000 K. Estimate the activation energy for this decomposition from
Arrhenius law.

‎2 9) The thermal decomposition of ethane to ethylene, methane, butane and hydrogen is

‎believed to proceed in the following sequence. Use the PSSH to derive the rate law

‎for formation of ethylene.
k1
‏لی‎ ೨2೦೫]
12
CH3 + പം ೨ CH, + CoH
k3
C,Hi > C,H, + ध्र"
k4
೧ಗ್ಯ + H* > C,H + ‏رط‎

‎+ 1८5
26215 2 ८4110
0) Define pseudo steady state hypothesis. Explain different types of intermediates with
examples.

‎3 a) Experimental analysis shows that the homogeneous decomposition of ozone

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