Chemical Reaction Engineering
Calcination reaction of limestone (CaCO₃ → CaO + CO₂) goes to completion in the rotary kiln, because

Of high calcination temperature
CaO is not dissociated
CO₂ escapes continuously
CaO is more stable than CaCO₃

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Chemical Reaction Engineering
In an ideal mixed reactor (at steady state), the

Space time is equivalent to holding time for constant density systems
Exit stream has the same composition as the fluid within the reactor
All of these
Composition throughout the reactor remains same

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