Understanding Reaction Kinetics and Reactors

What is the rate equation for a zero order reaction?

• Rate = k

• Rate = k[A]^2

• Rate = k[A]

• Rate = k^2

How does the concentration of reactants affect the rate of a zero order reaction?

• The concentration of reactants does not affect the rate of a zero order reaction.

• The rate is directly proportional to the square of the reactant concentration.

• The rate increases with higher reactant concentration.

• The rate decreases with higher reactant concentration.

What is the integrated rate law for a first order reaction?

• ln[A] = -kt + ln[A]₀

• [A] = -kt + [A]₀

• [A] = [A]₀e^(-kt)

• 1/[A] = kt + 1/[A]₀

How do you determine the half-life of a first order reaction?

• t1/2 = 0.693/k

• t1/2 = 1/k

• t1/2 = 0.301/k

• t1/2 = k/0.693

What is the relationship between the rate constant and temperature for a second order reaction?

• The rate constant decreases with temperature for a second order reaction.

• The rate constant remains constant regardless of temperature for a second order reaction.

• The rate constant is unaffected by temperature changes for a second order reaction.

• The rate constant increases with temperature for a second order reaction.

What is the unit of the rate constant for a second order reaction?

• L/(mol·s)

• L/(mol·min)

• mol/s

• L/s

Describe the characteristics of a batch reactor.

• Continuous flow operation

• Limited control over reaction conditions

• Characteristics of a batch reactor include fixed volume, discrete operation, no continuous flow, flexibility in processing, and precise control over reaction conditions.

• Variable volume during reaction

What are the advantages of using a mixed flow reactor?

• Lower energy consumption compared to other reactors

• Increased risk of temperature fluctuations

• Simplified design with fewer components

• Advantages of using a mixed flow reactor include improved mixing, enhanced reaction rates, versatility in handling varying flow rates, and better control over reaction conditions.

How does a plug flow reactor differ from a mixed flow reactor?

• A plug flow reactor has a uniform composition throughout its length.

• A mixed flow reactor operates in a batch mode without continuous mixing.

• A plug flow reactor allows for complete back-mixing of the reactants.

• A plug flow reactor has no back-mixing and varying composition along its length, while a mixed flow reactor has uniform composition due to continuous mixing.

What factors can affect the performance of a batch reactor?

• Type of feedstock used

• Ambient humidity levels

• Reactor size and shape

• Temperature, pressure, concentration, mixing efficiency, reaction time, catalyst presence, and physical properties.