1.

For a first order reaction, the rate constant is expressed in terms of initial concentration CAo and final concentration CA as ____(a) CA = CAo × k(b) CA = CAo × e^-kt(c) CA = CAo × kt(d) CA = CAo × e^ktThis question was posed to me in an online interview.My question is taken from Reaction Kinetics Elements in section Elements of Reaction Kinetics of Chemical Reaction Engineering

Answer»

The CORRECT choice is (B) CA = CAo × e^-kt

The EXPLANATION: (\(\frac{-DC}{dt}\)) = kCA

ln(\(\frac{CAo}{CA}\)) = kt

CA = CAo × e^-kt



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