Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is

Chemical Reaction Engineering
Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is

1

2

0

3

1

2

0

3

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Chemical Reaction Engineering
The units of frequency factor in Arhenious equation

Are cycles per unit time

Are the same as those of the rate constant

Depend on the order of the reaction

Depend on temperature, pressure etc. of the reaction

Are cycles per unit time

Are the same as those of the rate constant

Depend on the order of the reaction

Depend on temperature, pressure etc. of the reaction

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Chemical Reaction Engineering
In autocatalytic reactions,

One of the products acts as a catalyst

One of the reactants acts as a catalyst

No catalyst is used

Catalysts have very high selectivity

One of the products acts as a catalyst

One of the reactants acts as a catalyst

No catalyst is used

Catalysts have very high selectivity

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Chemical Reaction Engineering
An endothermic aqueous phase first order irreversible reaction is carried out in an adiabatic plug flow reactor. The rate of reaction

Is maximum at the exit of the reactor

Goes through a minimum along the length of the reactor

Is maximum at the inlet of the reactor

Goes through a maximum along the length of the reactor

Is maximum at the exit of the reactor

Goes through a minimum along the length of the reactor

Is maximum at the inlet of the reactor

Goes through a maximum along the length of the reactor

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Chemical Reaction Engineering
The sequence in which three CSTR's of volumes 5, 10 and 15 m³ will be connected in series to obtain the maximum production in a second order irreversible reaction is

10, 15, 5

15, 10, 5

5, 10, 15

10, 5, 15

10, 15, 5

15, 10, 5

5, 10, 15

10, 5, 15

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Chemical Reaction Engineering
Molecularity of a reaction

Both B and C

May not be equal to the order of reaction

Is always equal to the overall order of reaction

Can

Both B and C

May not be equal to the order of reaction

Is always equal to the overall order of reaction

Can

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Chemical Reaction Engineering

Chemical Reaction Engineering The units of frequency factor in Arhenious equation

Chemical Reaction Engineering In autocatalytic reactions,

Chemical Reaction Engineering An endothermic aqueous phase first order irreversible reaction is carried out in an adiabatic plug flow reactor. The rate of reaction

Chemical Reaction Engineering The sequence in which three CSTR's of volumes 5, 10 and 15 m³ will be connected in series to obtain the maximum production in a second order irreversible reaction is

Chemical Reaction Engineering Molecularity of a reaction

Chemical Reaction Engineering
The units of frequency factor in Arhenious equation

Chemical Reaction Engineering
In autocatalytic reactions,

Chemical Reaction Engineering
An endothermic aqueous phase first order irreversible reaction is carried out in an adiabatic plug flow reactor. The rate of reaction

Chemical Reaction Engineering
The sequence in which three CSTR's of volumes 5, 10 and 15 m³ will be connected in series to obtain the maximum production in a second order irreversible reaction is

Chemical Reaction Engineering
Molecularity of a reaction