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Le Châtelier's Principle & Catalysts

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Questions and Answers

What is the primary effect of a catalyst on a chemical reaction?

It lowers the activation energy barrier (correct)

It changes the equilibrium constant of the reaction

It increases the activation energy barrier

It alters the reaction mechanism completely

Which of the following statements is true about catalysis?

Catalysis affects the equilibrium constant of the reaction

Catalysis always increases the rate of reaction

Catalysis only works for reversible reactions

Catalysis lowers the activation energy barrier for the reaction (correct)

What does a catalyst not affect in a chemical reaction?

The activation energy barrier

The reaction mechanism

The rate of reaction

The equilibrium constant of the reaction (correct)

How does a catalyst affect the rate of reaction?

It increases the rate of reaction by lowering the activation energy barrier Signup and view all the answers

What is the relationship between the activation energy barrier and the rate of reaction?

A higher activation energy barrier means a slower rate of reaction Signup and view all the answers

What is the effect of a catalyst on the composition of the equilibrium mixture?

It has no effect Signup and view all the answers

What is the role of a catalyst in a reversible reaction?

To increase the rate of the forward reaction Signup and view all the answers

What happens to the rate of reaction when a catalyst is added?

It increases Signup and view all the answers

What is the effect of a catalyst on the equilibrium constant of a reversible reaction?

It has no effect on the equilibrium constant Signup and view all the answers

Why does a catalyst decrease the time taken to reach equilibrium?

Because it increases the rate of the forward reaction Signup and view all the answers

At what temperature range is the catalyst bed kept?

460 - 550 ºC Signup and view all the answers

What is the purpose of the heating coil in the process?

To heat the gases to the desired temperature Signup and view all the answers

What condition is required to maintain the catalyst bed at the desired temperature?

High pressure Signup and view all the answers

What is the likely role of the catalyst bed in the process?

To speed up the reaction Signup and view all the answers

What would be the expected result if the catalyst bed was not pre-heated?

The reaction would occur at a slower rate Signup and view all the answers