For a first order reaction carried out in a plug flow reactor, the space time is__________________?
Correct answer: A. (1/k) ln C0/C
- A. (1/k) ln C0/C
- B. (1/k) ln C/C0
- C. k ln C0/C
- D. k ln C/C0
Explanation
For a first-order reaction in a constant-density plug flow reactor, integrating dC/dτ = -kC gives τ = (1/k) ln(C0/C). Since conversion lowers C below C0, the logarithm is positive.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Reaction Engineering
395 free Chemical Reaction Engineering MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Reaction Engineering questions
Chemical reaction rate of a component depends upon the______________________?
Space time equals the mean residence time__________________?
The ratio of moles of a reactant converted into the desired product to that converted into unwanted product is called_________________?
A space time of 3 hours for a flow reactor means that___________________?
A CSTR is to be designed in which an exothermic liquid phase first order reaction of the type, A → R, is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given: CA0= 5 kmole/m3; XA = 0.5; Feed temperature = reactor temperature = 40°C. Rate constant at 40°C = 1 min-1; (ΔH) = - 40kJ/mole; ρ = 1000kg/m3 CP = 4 J/gm.°C ; q = 10-3 m3/min (ρ and CP are same for the reactant and product streams). The amount of heat to be removed is_________________?
If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship ?