Chemical Reaction Dynamics and Kinetics

What is the term used to describe the speed at which a chemical reaction occurs?

• Reaction time

• Reaction velocity

• Reaction speed

• Reaction rate

According to collision theory, what two conditions must be met for a reaction to occur?

• Presence of a catalyst and inhibitor

• High concentration and small particle size

• High temperature and low pressure

• Sufficient energy and proper orientation

What happens when particles collide without enough energy?

• They bounce apart unchanged

• They form new products

• They decrease in size

• They increase in temperature

In the context of collision theory, what is an ineffective collision?

• A collision that results in a reaction

• A collision that does not result in a reaction

• A collision that increases temperature

• A collision that decreases pressure

What is the minimum energy required for a reaction to occur called?

• Kinetic energy

• Potential energy

• Threshold energy

• Activation energy

Which type of reaction has a lower activation energy, exothermic or endothermic?

• Neither has activation energy

• Both have the same

• Endothermic

• Exothermic

How does increasing temperature generally affect the rate of a chemical reaction?

• It speeds up the reaction

• It stops the reaction

• It slows down the reaction

• It has no effect

What effect does increasing the concentration of reactants have on the reaction rate?

• Increases the reaction rate

• Decreases the reaction rate

• Stops the reaction

• Has no effect

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

• It increases the reaction rate without being consumed

• It decreases the reaction rate and is consumed

• It stops the reaction

• It has no effect on the reaction

What is an inhibitor in the context of chemical reactions?

• A substance that speeds up a reaction

• A substance that interferes with a catalyst

• A substance that has no effect

• A substance that is consumed in the reaction