Chemical Reaction Engineering
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

1kW
5/3 kW
2/3 kW
4kW

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Chemical Reaction Engineering
A space velocity of 5 hr⁻¹ means that

A fixed conversion of a given batch of feed takes 5 hours
Cent per cent conversion can be achieved in at least 5 hours
Five reactor volumes of feed (at specified conditions) are being fed into the reactor per hour
After every 5 hours, reactor is being filled with the feed

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Chemical Reaction Engineering
In a zero order reaction, reactants concentration does not change with time and the

Reaction rate is trebled when the initial concentration is trebled
Time for half change is independent of the initial concentration
Time for completion of the reaction is independent of the initial concentration
Time for half change is half the time taken for completion of the reaction

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