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Chemical Reaction

The rate controlling step for the heterogeneous irreversible catalytic reaction A(g) + B(g) → C(g) is the surface reaction of absorbed A with absorbed B to give adsorbed C. The rate expression for this reaction can then be written as (where, KA, KB and KC are the equilibrium constants and is the rate constant of the rate controlling step) ?

Chemical Reaction /
The rate controlling step for the heterogeneous irreversible catalytic reaction A(g) + B(g) → C(g) is the surface reaction of absorbed A with absorbed B to give adsorbed C. The rate expression for this reaction can then be written as (where, KA, KB and KC are the equilibrium constants and is the rate constant of the rate controlling step) ?

A. k KA pApB / (1 + KApA + KBpB)
B. k KAKB pApB / (1 + KApA + KBpB)
C. k KAKB pApB / (1 + KApA + KBpB + KCpC)
D. k KAKB pApB / (1 + KApA + KBpB + KCpC)2

The rate controlling step for the heterogeneous irreversible catalytic reaction A(g) + B(g) → C(g) is the surface reaction of absorbed A with absorbed B to give adsorbed C. The rate expression for this reaction can then be written as (where, KA, KB and KC are the equilibrium constants and is the rate constant of the rate controlling step) ? Read More »

Chemical Reaction

In the gaseous phase ammonia formation reaction (N2 + 3H2 ⇌ 2NH3), the value of the equilibrium constant depends on the_________________?

Chemical Reaction /
In the gaseous phase ammonia formation reaction (N2 + 3H2 ⇌ 2NH3), the value of the equilibrium constant depends on the_________________?

A. Total pressure of the system
B. Volume of the reactor
C. Temperature
D. Initial concentration of N2 and H2

In the gaseous phase ammonia formation reaction (N2 + 3H2 ⇌ 2NH3), the value of the equilibrium constant depends on the_________________? Read More »

Chemical Reaction

For a heterogeneous catalytic reaction____________________?

Chemical Reaction /
For a heterogeneous catalytic reaction____________________?

A. Free energy of activation is lowered in the presence of catalyst, which remains unchanged at
the end of reaction
B. A relatively small amount of catalyst can cause the conversion of large amount of reactants
which does not mean that catalyst concentration is important
C. The catalyst does not form an intermediate complex with the reactant
D. The surface of the catalyst does not play an important role during reaction

For a heterogeneous catalytic reaction____________________? Read More »

Chemical Reaction

Sometimes, batch process is preferred over continuous process, when the product___________________?

Chemical Reaction /
Sometimes, batch process is preferred over continuous process, when the product___________________?

A. Quality & yield cannot be achieved in continuous processes, because of long residence time
B. Sales demand is fluctuating
C. Both A. & B.
D. Neither A. nor B.

Sometimes, batch process is preferred over continuous process, when the product___________________? Read More »

Chemical Reaction