ChE Reaction Eng’g Flashcards
The reaction in which rate equation corresponds to a stoichiometric equation is called
Elementary reaction
The overall order of the reaction for the elementary reaction A + 2B -> C
3
The rate of formation of B in terms of rA, where rA=-kCACB^2 is
2rA
In which of the following cases does the reaction go farthest to completion?
A. k= 10^2
B. k= 10^-2
C. k= 10
D. k=1
A. k= 10^2
If “n” is the order of reaction, then unit of rate constant is
1/(time)(concentration)^n-1
If the rate of reaction is independent of the concentration of the reactants, the reaction is said to be
Zero order
If the reaction, 2A + B -> is second order, what plot will give it straight line?
1/CA vs. Time
Half-life period of a chemical reaction is
The time required to reduce the concentration of the reacting substance to half of its initial value
The half-life of a material undergoing second order decay is
inversely proportional to initial concentration
With increases in temperature, the rate constant obeying Arrhenius equation
Increases
Which of the statements is wrong?
A. From Arrhenius Law, the value of the frequency factor, ko does affect the temperature sensitivity.
B. Reactions with high E are very T- sensitive, with low E are relatively T- insensitive
C. Any given reaction is much more T-sensitive at a low T than at a high T
D. From Arrhenius law, a plot of In k vs 1/T gives a straight line, with large slope for large E and small slope for small E.
A. From Arrhenius Law, the value of the frequency factor, ko does affect the temperature sensitivity.
The equilibrium constant of a chemical reaction
remains unaffected in the presence of a catalyst
A batch reactor is characterized by
the variation in extent of reaction and properties of the reaction mixture with time
A plug-flow reactor is characterized by
presence of lateral mixing
A backmix reactor
is same as ideal stirred tank reactor
