Question

State true or false.

=-\(\frac{1}{V}\frac{dN_A}{dt}=-\frac{dC_A}{dt}\) is valid only if A → B.

(a) =-\(\frac{1}{V}\frac{dN_A}{dt}=-\frac{dC_A}{dt}\) is valid only if A → B.

(b) True

(c) False

The question was posed to me by my school principal while I was bunking the class.

This interesting question is from Liquid and Gas Phase Reactions in division Kinetics of Homogeneous Reactions of Chemical Reaction Engineering

Answer 1

Correct choice is (a) =-\(\frac{1}{V}\frac{dN_A}{dt}=-\frac{dC_A}{dt}\) is valid only if A → B.

For explanation I would say: The volume of reaction mixture remains constant as the number of moles of reactant and product is the same. Hence, the number of moles per unit volume does not vary during the progress of the reaction. Hence, the number of moles per unit volume is expressed as concentration of the reactant, A.