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Explain physical significance of activation energy. Also discuss temperature dependency of activation energy using Arrhenius theory.
Milk is pasteurized if it is heated to 63°C for 30 min, but if it is heated to 74°C it only needs 15 s for the same result. Determine the activation energy of this sterilization process.
On doubling the concentration of reactant, the rate of reaction triples. Find the reaction order.
Derive the rate expression for Irreversible Unimolecular-Type First-Order Reactions.
The first-order reversible liquid reaction takes place in a batch reactor. takes place in a batch reactor. After 8 minutes, conversion of A is 33.3% while equilibrium conversion is 66.7%. Find the rate equation for this re- action.
For a gas reaction at 400 K the rate is reported as
for this reaction if the rate equation is expressed as:
Explain differential method of analysis for deriving the kinetics for homogeneous chemical reaction.
Explain integral method of analysis for deriving the kinetics for homogeneous chemical reaction.
Develop an expression that facilitates calculation of units of rate constant for any order. Give the unit of rate constant for first, second and third order reaction.
An aqueous feed of A and B (400 literlmin, 100 mmol A per liter, 200 mmol B per liter) is to be converted to product in a plug flow reactor. The kinetics of the reaction is represented by Find the volume of reactor needed for 99.9% conversion of A to product.
Evaluate the size of plug flow reactor operating at 649°C and 11.4 atm which is needed for 75% conversion of 10 mol/hr of phosphine in a 2/3 phosphine-1/3 inert feed.
Explain the procedure to determine the best system for a given conversion when two CSTR of different sizes are connected in series.
The concentration readings given in Table 1 represent a continuous response to a pulse input into a closed vessel which is to be used as a chemical reactor. Calculate the mean residence time of fluid in the vessel t, and tabulate and plot the exit age distribution E. Table 1 Time T, min Tracer Output (Cpulse), gm/L of fluid
| 0 | 0 |
|---|---|
| 5 | 3 |
| 10 | 5 |
| 15 | 5 |
| 20 | 4 |
| 25 | 2 |
| 30 | 1 |
| 35 | 0 |
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Official Gujarat Technological University (GTU) examination paper for Chemical Reactions Engineering I (Summer 2026, B.E. · Chemical Engineering, Sem 6). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.
3160506 Chemical Reactions Engineering I
Official GTU PDF · Summer 2026
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