The rate expression for a heterogenous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + Kr.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A)

Chemical Reaction Engineering
The rate expression for a heterogenous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + Kr.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A)

E + ΔHA

E + ΔHA - ΔHR

ΔHA + ΔHR

E

E + ΔHA

E + ΔHA - ΔHR

ΔHA + ΔHR

E

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Chemical Reaction Engineering
Which of the following does not produce a change in the value of rate constant of a reaction?

Concentration and catalyst

Pressure

Temperature

None of these

Concentration and catalyst

Pressure

Temperature

None of these

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Chemical Reaction Engineering
Which of the following chemical reactions will be favoured by low pressure ?

N₂ + O₂ ⇋ 2NO

2HI ⇋ H₂ + I₂

N₂O₂ ⇋ 2NO₂

None of these

N₂ + O₂ ⇋ 2NO

2HI ⇋ H₂ + I₂

N₂O₂ ⇋ 2NO₂

None of these

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Chemical Reaction Engineering
The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the

Reaction is elementary but the molecularity may not be 2

Molecularity of the reaction is 2, but the reaction may not be elementary

Reaction is elementary with a molecularity of 2

Reaction may be elementary with molecularity of 2

Reaction is elementary but the molecularity may not be 2

Molecularity of the reaction is 2, but the reaction may not be elementary

Reaction is elementary with a molecularity of 2

Reaction may be elementary with molecularity of 2

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Chemical Reaction Engineering
The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor.

Equal to

Greater than

Unpredictable from the data

Smaller than

Equal to

Greater than

Unpredictable from the data

Smaller than

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Chemical Reaction Engineering
Half life period of a chemical reaction is

Half of the space time of a reaction

The time required to reduce the concentration of the reacting substance to half its initial value

Half of the residence time of a reaction

None of these

Half of the space time of a reaction

The time required to reduce the concentration of the reacting substance to half its initial value

Half of the residence time of a reaction

None of these

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Chemical Reaction Engineering

Chemical Reaction Engineering Which of the following does not produce a change in the value of rate constant of a reaction?

Chemical Reaction Engineering Which of the following chemical reactions will be favoured by low pressure ?

Chemical Reaction Engineering The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the

Chemical Reaction Engineering The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor.

Chemical Reaction Engineering Half life period of a chemical reaction is

Chemical Reaction Engineering
Which of the following does not produce a change in the value of rate constant of a reaction?

Chemical Reaction Engineering
Which of the following chemical reactions will be favoured by low pressure ?

Chemical Reaction Engineering
The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the

Chemical Reaction Engineering
The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor.

Chemical Reaction Engineering
Half life period of a chemical reaction is