Factors Affecting Reaction Rates

What is the effect of temperature on reaction rates according to the passage?

• Reactions generally proceed faster at higher temperatures.

• Reactions generally proceed slower at higher temperatures.

• Temperature has no effect on reaction rates.

• Reactions stop at higher temperatures.

Which factor is NOT mentioned as affecting reaction rates in the passage?

• Chemical nature of reactants

• State of subdivision

• Color of reactants

• Presence of a catalyst

According to the passage, what role does a catalyst play in a chemical reaction?

• It lowers the activation energy required for the reaction.

• It increases the activation energy required for the reaction.

• It changes the chemical nature of the reactants.

• It decreases the concentration of reactants.

What does the collision theory of reactivity state about molecular collisions?

• Molecules must collide with the correct orientation and sufficient energy to react.

• Molecules must collide with any orientation to react.

• Molecules do not need to collide to react.

• Molecules must collide with low energy to react.

How does the Arrhenius equation relate to reaction rates?

• It shows that the rate constant of a reaction increases with temperature.

• It shows that the rate constant of a reaction decreases with temperature.

• It shows that the rate constant of a reaction is unaffected by temperature.

• It shows that the rate constant of a reaction is only affected by concentration.