Reversible reactions (P2C2)

Question 1

What is a catalyst?

Answer 1

A catalyst is a substance is a substance that increases the rate of a reaction without being used up.

Question 2

How do catalysts speed up reactions?

Answer 2

Catalysts provide a lower energy pathway for reactants to react, allowing for more successful collisions.

Question 3

What is an equilibrium in a closed system?

Answer 3

An equilibrium is the point at which the forwards rate of reaction is equal to the backwards rate of reaction.

Question 4

How does raising the temperature in a reversible reaction affect the yield?

Answer 4

Raising the temperature in a reversible reaction will favour the endothermic reaction, increasing the yield of the opposite reactant.

Question 5

How does raising the pressure of a gaseous reaction affect the yield?

Answer 5

Raising the pressure in a reversible reaction will favour the reaction that produces the fewer gas molecules.