Collision Theory & Reaction Dynamics Charb

In the reaction shown in the diagram, what are the reactants?

• A₂ and B₂

• 2AB

• Water and salt

• AB and BA

Which of the following best summarizes collision theory?

• Reactions occur when particles collide with enough energy and the correct orientation

• Reactions occur only at high temperatures

• Reactions occur when particles are large

• Reactions occur only in liquids

What is required for an activated complex to form during a chemical reaction?

• Collision of reactant molecules

• Presence of a catalyst only

• High pressure only

• No energy input

If molecules collide with correct orientation but insufficient energy, what happens?

• They rebound without reacting

• They form products

• They form a stable compound

• They break apart permanently

What is the main function of the activated complex in a chemical reaction?

• To act as a transition state between reactants and products

• To store energy permanently

• To slow down the reaction

• To prevent bond formation

What is the role of orientation in molecular collisions for reaction success?

• Correct orientation is necessary for bond breaking/forming

• Any orientation will result in a reaction

• Orientation has no effect

• Incorrect orientation speeds up the reaction

Which statement is true about activation energy?

• It is the minimum energy needed to start a reaction

• It is the maximum energy released in a reaction

• It is the energy stored in the products

• It is the energy lost as heat

Which of the following is NOT a correct description of activation energy?

• The energy that must be provided to start the reaction

• The minimum energy needed to form the activated complex

• The energy released after the reaction is complete

• The energy required to initiate a chemical reaction

A student says, "Activation energy is the energy released during a reaction." Is this statement correct? Why or why not?

• No, activation energy is the energy needed to start a reaction

• Yes, activation energy is the energy released

• No, activation energy is the energy stored in products

• Yes, activation energy is the energy lost as heat

How does activation energy relate to the rate of a chemical reaction?

• Higher activation energy means a slower reaction

• Higher activation energy means a faster reaction

• Activation energy does not affect reaction rate

• Activation energy only affects physical changes