An irreversible aqueous phase reaction, A + B → P, is carried out in an adiabatic mixed flow reactor. A feed containing 4kmole/m³ of each A and B enters the reactor at 8m³ /hr. If the temperature of the exit stream is never to exceed 390 K, what is the maximum inlet feed temperature allowed? (Data: Heat of reaction = – 50 kJ/mole, Density of the reacting mixture = 1000kg/m³, Specific heat of reacting mixture = 2kJ/kg.K) The above data can be assumed to be independent of temperature and composition.

190
290
390
490
✅ The correct answer is option B.

The minimum energy required to allow a chemical reaction to proceed is termed as the ‘threshold energy ‘. Chemical reaction with low activation energy are

Always irreversible
Insensitive to temperature changes
Mostly irreversible
Highly temperature sensitive
✅ The correct answer is option B.

With increase in the order of reaction (for all positive reaction orders), the ratio of the volume of mixed reactor to the volume of plug flow reactor (for identical feed composition, flow rate and conversion)

Increases
Decreases
Remains same
Increases linearly
✅ The correct answer is option A.