Mole balance equation for a perfectly mixed batch reactor is _______(a) \(\frac{dNi}{dt}\) = 0(b) \(\frac{dNi}{dt}\) = ri V(c) \(\frac{dNi}{dt} = \int_0^V\)ri dV(d) \(\frac{dNi}{dt}\) = riThis question was addressed to me at a job interview.The query is from Mole Balances topic in portion Basic Concepts of Chemical Reaction Engineering

Mole balance equation for a perfectly mixed batch reactor is _______(a

1.	Mole balance equation for a perfectly mixed batch reactor is _______(a) \(\frac{dNi}{dt}\) = 0(b) \(\frac{dNi}{dt}\) = ri V(c) \(\frac{dNi}{dt} = \int_0^V\)ri dV(d) \(\frac{dNi}{dt}\) = riThis question was addressed to me at a job interview.The query is from Mole Balances topic in portion Basic Concepts of Chemical Reaction Engineering
Answer» Right answer is (b) \(\frac{dNi}{dt}\) = ri V Best EXPLANATION: GENERAL mole balance for batch reactor is \(\frac{dNi}{dt} = \int_0^V\)ri dV. For perfectly mixed batch REACTORS there are no spatial variations and above equation can be modified as ri = \(\frac{1}{V} \frac{dNi}{dt}. \)

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